GS-52: Green Seal Standard for Specialty Cleaning Products for Household Use, Edition 2.6, November 11, 2021 (corrections/clarifications last made January 28, 2022)

Overview

The binding text of Green Seal’s voluntary environmental certification standard for specialty cleaning products intended for household use. Edition 2.6 was issued November 11, 2021, replacing Edition 2.5 from April 8, 2020; the version retrieved (©2021 Green Seal, Inc., file Green_Seal_GS-52_Specialty_Household_Cleaners_2022.pdf) carries corrections and clarifications last made on January 28, 2022 per the Foreword (p. 5). The standard is 41 pages organised into 7 main clauses (Scope; Product-Specific Performance Requirements; Product-Specific Sustainability Requirements; Manufacturing Sustainability Requirements; Packaging Sustainability Requirements; User Information and Product Label Requirements; Trademark Use Requirements) and 4 normative annexes (Definitions; Powders/Solids/Non-Aqueous Liquids; Enzymes; Microorganisms) plus two informative appendices (Appendix 1 Scope; Appendix 2 Naturally Derived Components).

Heavy-metal coverage in Edition 2.6 operates through three distinct mechanisms across the Product-Specific Sustainability and Packaging Sustainability clauses. First, the Colorants criterion (section 3.21) requires each colorant to be FDA-certified for ingestion, a natural colorant, or to not have any of nine named heavy metals intentionally added: arsenic, cadmium, cobalt, hexavalent chromium, lead, manganese, mercury, nickel, and selenium. Second, the Prohibited Components criterion (section 3.18) prohibits in the undiluted product the heavy metals lead, hexavalent chromium, or selenium; either in the elemental form or compounds, alongside 2-butoxyethanol, alkylphenol ethoxylates, halogenated organic solvents, nitro-musks, o-phenylphenol, ozone-depleting compounds, phthalates, polycyclic musks, Toxic Release Inventory Persistent, Bioaccumulative, and Toxic (TRI PBT) chemicals, and triclosan, with a footnote (p. 18) citing endocrine disruption, neurotoxicity, and systemic toxicity as the basis. Third, the Packaging Sustainability > Heavy Metal Restrictions sub-clause (section 5.5) sets a sum-of-concentrations numerical ceiling on lead, mercury, cadmium, and hexavalent chromium in primary packaging: these four metals shall not be intentionally introduced and their sum shall not exceed 100 parts per million by weight, with an exception for refillable packages or packages that would not exceed but for the addition of post-consumer material. A parallel Other Restrictions sub-clause (section 5.6) prohibits intentional introduction of phthalates, bisphenol A, and chlorinated packaging material to a plastic primary package, with the same post-consumer-material exception.

GS-52 covers specialty household cleaners that fall outside the routine general-purpose / floor / restroom / toilet / glass / carpet cleaner scope of the sibling Green Seal Standard GS-8 (Cleaning Products for Household Use) and outside the industrial and institutional scope of the sibling GS-37: Green Seal Standard for Cleaning Products for Industrial and Institutional Use — Edition 7.8 (New Format), June 23, 2022 (corrections/clarifications last made August 23, 2024). Appendix 1 (pp. 39-40) enumerates in-scope household categories including adhesive remover; boat cleaning (hull, bilge); boat wax/polish/sealant/glaze; chewing gum remover; deck/siding/outdoor furniture cleaning; dish cleaning (automatic, hand, rinse agent); antimicrobial pesticide products (disinfectants, sanitizers); drain additive/cleaning; dusting aid; electronic cleaning; fruit and vegetable wash; furniture polish; graffiti remover; grout cleaning; holding tank treatment; leather cleaning; metal cleaning; mold and mildew stain remover; motor vehicle cleaning, dressing, windshield washing fluid, and wax/polish/sealant/glaze; odor remover; optical lens cleaning; oven cleaning; pressurized gas dusting; recreational vehicle tank treatment; rust stain remover; septic tank treatment; stone cleaning; tire and wheel cleaning; upholstery cleaning; waterless motor vehicle cleaning; and products containing microorganisms or enzymes (in non-spray packaging only). Appendix 1 excluded categories include air fresheners; cleaners/degreasers in production/maintenance applications (GS-34); dry erase board cleaning products (GS-37); industrial and institutional floor finish/strippers (GS-40); general-purpose/restroom/glass/carpet cleaners with or without enzymes/microorganisms for industrial and institutional use (GS-37); the same categories marketed for household use (GS-8); hand cleaning for industrial/institutional (GS-41) and household use (GS-44); hand dish cleaning products formulated with antimicrobial agents to support antimicrobial claims; industrial and institutional versions of any in-scope item; laundry care (covered by GS-48, in development); paint remover/thinner; products containing enzymes sold in spray packaging; pump and sewer treatment; and sterilizers or high-level disinfectants for critical medical devices.

This page documents the binding standard text as the operative GS-52 reference for specialty household cleaning products. The sibling GS-37: Green Seal Standard for Cleaning Products for Industrial and Institutional Use — Edition 7.8 (New Format), June 23, 2022 (corrections/clarifications last made August 23, 2024) is the operative reference for the industrial and institutional general-purpose, restroom, glass, and carpet cleaner scope; the sibling Version Comparison of Green Seal's Environmental Standard for Industrial and Institutional Cleaners, GS-37 — Third Edition (February 27, 2006) vs. Fourth Edition (August 29, 2008) is the 2006-vs-2008 GS-37 version-comparison artefact. Green Seal Standard GS-8 (Cleaning Products for Household Use), referenced in the GS-52 scope exclusions, is not yet in the library.

Key numbers

Numerical content below is the subset most relevant to HMI synthesis on specialty household cleaning product groups: the three heavy-metal-specific clauses in full, plus the adjacent numerical thresholds (VOC limits, oral/inhalation/dermal LD/LC50, vapor-pressure thresholds, biodegradability percentages, BCF and log K_ow, aquatic LC50, eutrophication phosphorus, combustibility flashpoint, post-consumer-material percentage, dilution-ratio requirement, and the Annex B/C/D thresholds) that contextualise the heavy-metal limits within the standard’s overall quantitative register.

Heavy-metal-specific prohibitions and limits

Item	Edition 2.6 (November 11, 2021 / corrections January 28, 2022)	Source location
Colorants — named metals not to be intentionally added (when colorant is not FDA-certified for ingestion and not a natural colorant)	“arsenic, cadmium, cobalt, hexavalent chromium, lead, manganese, mercury, nickel, and selenium” (9 metals)	p. 19 § 3.21 Colorants
Prohibited Components — named heavy metals (undiluted product)	“The heavy metals lead, hexavalent chromium, or selenium; either in the elemental form or compounds” (3 metals); plus 2-butoxyethanol, alkylphenol ethoxylates, halogenated organic solvents, nitro-musks, o-phenylphenol, ozone-depleting compounds, phthalates, polycyclic musks, TRI PBT chemicals, triclosan	p. 18 § 3.18 Prohibited Components
Prohibited Components — footnoted basis	”The listed components are prohibited because they have demonstrated one or more of the following health concerns: endocrine disruption, neurotoxicity, and systemic toxicity. Other chemicals may have such health concerns but are not listed because they may already be prohibited through other criteria in the standard.”	p. 18 § 3.18 footnote 13
Packaging Heavy Metal Restrictions — named metals (primary packaging)	“The heavy metals lead, mercury, cadmium, and hexavalent chromium” (4 metals)	p. 21 § 5.5 Heavy Metal Restrictions
Packaging Heavy Metal Restrictions — sum-of-concentrations ceiling	”the sum of the concentration levels of these metals shall not exceed 100 ppm; an exception is allowed for refillable packages or packages that would not exceed this maximum level but for the addition of post-consumer material”	p. 21 § 5.5 Heavy Metal Restrictions
Packaging Heavy Metal Restrictions — Intentional Introduction definition (Annex A)	“The use of substances for their desired or deliberate presence in the primary package for the purpose of providing a specific characteristic or quality. It does not refer to the use of substances as processing aids or the use of an intermediate that imparts certain chemical or physical changes during manufacturing, as long as the substance or intermediate is present in the primary package at concentrations below 100 ppm.”	p. 28 Annex A Intentionally Introduced
Packaging Other Restrictions — additional substances prohibited from intentional introduction to plastic primary package	”Phthalates, bisphenol A, and chlorinated packaging material” (post-consumer-material exception applies)	p. 21 § 5.6 Other Restrictions

Non-metal numerical limits (preserved for context)

Criterion	Edition 2.6 value	Source location
Acute Toxicity — undiluted product not toxic to humans	Oral lethal dose (LD50) ≤ 5,000 mg/kg; Inhalation lethal concentration (LC50) ≤ 20,000 ppmV at 1 hr; Dermal lethal dose (LD50) ≤ 2,000 mg/kg; weighted-average mixture formula TP = (Σ wt_i / TV_i)^-1 permitted in lieu of testing	p. 12 § 3.3 Acute Toxicity
Acute Toxicity — inhalation determined for vapor-pressure threshold	components at 0.01% or more in undiluted product with vapor pressure > 1 mm Hg at 1 atm and 20°C	p. 12 § 3.3 closing sentence
Skin and Eye Damage — assumed corrosive/serious-eye-damage pH bounds (data may rebut)	pH ≤2.0 or pH ≥11.5	p. 12 § 3.4 Skin and Eye Damage
Skin Absorption — concentration threshold above which ACGIH-TLV-skin-notation or DFG-MAK-skin-absorption-H-notation components are prohibited	≥1% individual component; or component combinations summing to ≥1% on ACGIH or DFG with the same target organ	p. 13 § 3.11 Skin Absorption
VOC — vapor-pressure threshold defining “volatile”	>0.1 mm Hg at 1 atm, 20°C	p. 14 § 3.12 VOC Content
VOC — product as used, default for product categories not regulated by CARB	≤1% by weight OR a CARB or South Coast Air Quality Management District limit for a similar product category that the manufacturer can prove is more appropriate (higher of)	p. 14 § 3.12 VOC Content
Chronic Inhalation Toxicity (alternative 3.13.1)	NOAEL ≤1.0 mg/L vapor (90 days @ 6 h/day, Haber’s rule extrapolation from other exposure regimes); LOAEL with 10-fold safety factor (LOAEL/10) permitted in lieu of NOAEL; classification per OECD Harmonized Integrated Classification System	p. 16 § 3.13.1 Chronic Inhalation Toxicity
Chamber Testing (alternative 3.13.2)	GREENGUARD Children and Schools Certification Program Method for Measuring and Evaluating Chemical Emissions from Cleaners and Cleaning Maintenance Products and Systems Using Dynamic Environmental Chambers; meet inhalation-toxicity criteria from the method referencing Green Seal Standard GS-37	pp. 16-17 § 3.13.2 Chamber Testing
Toxicity to Aquatic Life — product as used not toxic	Acute LC50 ≥100 mg/L for fish, daphnia, or algae; per ISO 7346-2 (fish), OECD TG 203 (fish), OECD TG 202 (daphnia), OECD TG 201 (algae)	p. 17 § 3.14 Toxicity to Aquatic Life
Aquatic Biodegradability — ready biodegradability via OECD definition, 28-day test, criterion met within 10 days of first reaching 10% biodegradation	DOC removal >70%; BOD >60%; BOD as % of ThOD >60%; CO₂ evolution as % of theoretical CO₂ >60% (10-day window does not apply to structurally-related surfactant homologues per OECD guidance)	p. 17 § 3.15 Aquatic Biodegradability
Aquatic Biodegradability — alternative options for substances not exhibiting ready biodegradability	(1) OECD 303A Coupled Units Test: DOC removal >90%; (2) Acute LC50 ≥100 mg/L (algae, daphnia, or fish) AND inherent ultimate biodegradability with biodegradation >70% (as BOD, DOC, or COD) per ISO 9887 / ISO 9888 / OECD 302A-C; EPA BioWin (EpiSuite) QSAR acceptable when experimental data unavailable	pp. 17-18 § 3.15 Alternative Evaluation Options
Bioaccumulating Compounds	BCF ≥500 (or log K_ow ≥4); OECD TG 305 preferred for BCF; components meeting biodegradability section 3.15 may be considered not bioaccumulative	p. 18 § 3.16 Bioaccumulating Compounds
Eutrophication — phosphorus in product as used	≤0.5% by weight (“shall not contain phosphorus at more than 0.5% by weight”)	p. 18 § 3.17 Eutrophication
Combustibility — flashpoint floor for undiluted product or 99% by volume of product components	>150°F as tested by ASTM D92-05a Cleveland Open Cup Tester, ISO 13736 Abel Closed-Cup, or ISO 2719 Pensky-Martens Closed-Cup; alternatively, the product shall not sustain a flame per ASTM D 4206	p. 18 § 3.19 Combustibility
Optical Brighteners	not contained at 0.01% or more in undiluted product	p. 19 § 3.22 Optical Brighteners
Concentrates and Dosing — minimum dilution ratio (boat cleaning, motor vehicle cleaning, and deck/siding/outdoor furniture cleaning)	1:8 minimum concentrate-to-use solution dilution ratio; other product categories may be sold in ready-to-use form	p. 19 § 3.23 Concentrates and Dosing
Primary Package — at least one of	source-reduced package; recyclable; 25% post-consumer material; refillable package with effective take-back program; or alternative approach independently proven to have similar life-cycle benefit	p. 20 § 5.1 Primary Package
Aerosol Packaging — particle-size restriction (point-of-delivery)	particles between 10-2.5 microns shall not comprise more than 1% of total particles and no particles below 2.5 microns	p. 21 § 5.4 Aerosol Packaging
Source-Reduced Package definition (Annex A)	at least 20% less material (by weight) compared to containers commonly used for that product type	p. 32 Annex A Source-Reduced Package
Take-Back Program definition (Annex A)	sponsored by original product manufacturer; demonstrated to receive at least 50% of sold packages for recycling or reuse	p. 32 Annex A Take-Back Program
Refillable Package definition (Annex A)	routinely returned to and refilled by product manufacturer at least five times with the original product held by the package, demonstrated in practice	p. 30 Annex A Refillable Package

CARB regulatory VOC limits (Edition 2.6 referenced subset, p. 14-16 table)

The standard reproduces the current California Air Resources Board (CARB) regulatory limits for VOC content as the binding ceiling for product categories regulated by CARB. The full table at pp. 14-16 spans 25 CARB-regulated product-category families (Adhesive Remover; Dual-Purpose Air Freshener/Disinfectant; Automotive Wax/Polish/Sealant/Glaze; Brake Cleaner; Bug and Tar Remover; Carburetor/Fuel-injection Air Intake Cleaner; Upholstery Cleaner; Disinfectant; Dusting Aid; Electrical Cleaner; Electronic Cleaner; Engine Degreaser; Fabric Refresher; Footwear or Leather Care; Furniture polish; Glass cleaners; Graffiti Remover; Metal Polish or Cleanser; Motor Vehicle Wash; Odor Remover/Eliminator; Oven or Grill Cleaner; Sanitizer; Spot Remover; Tire or Wheel Cleaner; Wood Cleaner) that expand to 51 form-specific sub-rows (aerosol vs nonaerosol vs liquid vs solid variants); the rows below reproduce every sub-row as documented in the standard. Per footnote 12 (p. 14), these limits are a reference to the current CARB regulatory limits and will be updated to reflect any future CARB amendments. Where Appendix 1 GS-52 scope does not include a CARB-table category (e.g., glass cleaners, which are GS-8 / GS-37 scope), the row is preserved for completeness because the standard’s text reproduces it without scope filtering.

Product Category	Effective Date	Limit (%)	Source location
Adhesive Remover (Floor or Wall Covering)	12/31/2006	5	p. 14 § 3.12
Adhesive Remover (Gasket or Thread Locking)	12/31/2006	50	p. 14 § 3.12
Adhesive Remover (General Purpose)	12/31/2006	20	p. 14 § 3.12
Adhesive Remover (Specialty)	12/31/2006	70	p. 14 § 3.12
Dual Purpose Air Freshener/Disinfectant (aerosol)	1/1/1994	60	p. 15 § 3.12
Dual Purpose Air Freshener/Disinfectant (liquid/pump spray)	1/1/1993	18	p. 15 § 3.12
Dual Purpose Air Freshener/Disinfectant (solid/semisolid)	1/1/1993	3	p. 15 § 3.12
Automotive Wax/Polish/Sealant/Glaze (hard paste wax)	1/1/2005	45	p. 15 § 3.12
Automotive Wax/Polish/Sealant/Glaze (instant detailer)	1/1/2001	3	p. 15 § 3.12
Automotive Wax/Polish/Sealant/Glaze (all other forms)	1/1/2005	15	p. 15 § 3.12
Brake Cleaner	12/31/2010	10	p. 15 § 3.12
Bug and Tar Remover	1/1/2002	40	p. 15 § 3.12
Carburetor or Fuel-injection Air Intake Cleaner	12/31/2010	10	p. 15 § 3.12
Upholstery Cleaner (aerosol)	12/31/2010	5	p. 15 § 3.12
Upholstery Cleaner (nonaerosol — dilutable)	1/1/2001	0.1	p. 15 § 3.12
Upholstery Cleaner (nonaerosol — ready-to-use)	12/31/2010	1	p. 15 § 3.12
Disinfectant (aerosol)	12/31/2008	70	p. 15 § 3.12
Disinfectant (nonaerosol)	12/31/2008	1	p. 15 § 3.12
Dusting Aid (aerosol)	12/31/2010	17	p. 15 § 3.12
Dusting Aid (nonaerosol)	12/31/2010	3	p. 15 § 3.12
Electrical Cleaner	12/31/2006	45	p. 15 § 3.12
Electronic Cleaner	12/31/2007	75	p. 15 § 3.12
Engine Degreaser (aerosol)	12/31/2010	10	p. 15 § 3.12
Engine Degreaser (nonaerosol)	12/31/2004	5	p. 15 § 3.12
Fabric Refresher (aerosol)	12/31/2006	15	p. 15 § 3.12
Fabric Refresher (nonaerosol)	12/31/2006	6	p. 15 § 3.12
Footwear or Leather Care Product (aerosol)	12/31/2006	75	p. 15 § 3.12
Footwear or Leather Care Product (solid)	12/31/2006	55	p. 15 § 3.12
Footwear or Leather Care Product (all other forms)	12/31/2006	15	p. 15 § 3.12
Furniture polish (aerosol)	12/31/2004 (12/31/2013)	17 (12)	p. 15 § 3.12
Furniture polish (nonaerosol — except solid/paste forms)	1/1/1994	7	p. 15 § 3.12
Furniture polish (all other forms — except solid/paste forms)	12/31/2008	3	p. 15 § 3.12
Glass cleaners (preserved as in source despite GS-52 scope exclusion)	12/31/2012	3	p. 15 § 3.12
Graffiti Remover (aerosol)	12/31/2006	50	p. 16 § 3.12
Graffiti Remover (nonaerosol)	12/31/2006	30	p. 16 § 3.12
Metal Polish or Cleanser (aerosol)	12/31/2012	15	p. 16 § 3.12
Metal Polish or Cleanser (nonaerosol)	12/31/2012	3	p. 16 § 3.12
Motor Vehicle Wash (nonaerosol)	12/31/2010	0.2	p. 16 § 3.12
Odor Remover/Eliminator (aerosol)	12/31/2010	25	p. 16 § 3.12
Odor Remover/Eliminator (nonaerosol)	12/31/2010	6	p. 16 § 3.12
Oven or Grill Cleaner (aerosol/pump spray)	1/1/1993	8	p. 16 § 3.12
Oven or Grill Cleaner (liquid)	1/1/1993	5	p. 16 § 3.12
Oven or Grill Cleaner (nonaerosol)	12/10/2011	4	p. 16 § 3.12
Sanitizer (aerosol)	12/31/2008	70	p. 16 § 3.12
Sanitizer (nonaerosol)	12/31/2008	1	p. 16 § 3.12
Spot Remover (aerosol)	12/31/2012	15	p. 16 § 3.12
Spot Remover (nonaerosol)	12/31/2012	3	p. 16 § 3.12
Tire or Wheel Cleaner (aerosol)	12/31/2010	8	p. 16 § 3.12
Tire or Wheel Cleaner (nonaerosol)	12/31/2010	2	p. 16 § 3.12
Wood Cleaner (aerosol)	12/31/2006	17	p. 16 § 3.12
Wood Cleaner (nonaerosol)	12/31/2006	4	p. 16 § 3.12

Three category-specific CARB cross-mappings are noted at p. 14: “CARB VOC requirements for glass cleaners shall apply to optical lens cleaning products”; “CARB VOC requirements for motor vehicle wax, polish, sealant, or glaze products shall apply to motor vehicle dressing products”; “CARB VOC requirements for bug and tar removers shall apply to chewing gum remover products.”

Normative-annex thresholds

Annex / item	Edition 2.6 value	Source location
Annex B Powders/Solids/Non-Aqueous Liquids — alternate acute-tox oral LD50 threshold	300 mg/kg (replaces 3.3 5,000 mg/kg threshold); also exempt from skin/eye damage (3.4)	p. 34 Annex B opening sentence
Annex B Drop Test (Packaging Durability alternative to Child-Resistant Packaging)	48 inches, 4 drops (flat-on-bottom, flat-on-top, flat-on-side, corner); no leak, contents retained, no safety-affecting outer-package damage	p. 34 Annex B § A(2)(i)
Annex B Child-Resistant Packaging (alternative to Packaging Durability)	ASTM D3475 classification; tested per ISO 8317 or European Standard EN 862	p. 34 Annex B § A(1)
Annex B Labelling — signal words triggered by skin corrosion / serious eye damage / oral LD50 between 300 and 5,000 mg/kg	”WARNING” or “CAUTION” with applicable precautionary measures; “KEEP OUT OF REACH OF CHILDREN”	pp. 34-35 Annex B § C
Annex C Enzymes — enzyme form	Liquid OR encapsulated solid (or other dust-free solid) with minimum diameter ≥0.15 mm (smaller permitted if airborne enzyme concentration demonstrated ≤encapsulated-solids equivalent)	p. 36 Annex C § A
Annex C Enzymes — titanium dioxide exemption	Titanium dioxide exempt from carcinogen prohibition (3.5) when present only due to enzyme use; in solids, TiO₂ must be bound within the product or enzyme matrix or bonded to other ingredients	p. 36 Annex C § D
Annex D Microorganisms — GMM prohibition	The presence of GMM as components in finished products is prohibited	p. 37 Annex D § A
Annex D Microorganisms — biosafety classification	WHO Risk Group 1 (or equivalent); most-hazardous designation across international lists applies for conflicting designations	p. 37 Annex D § B; p. 33 Annex A WHO Risk Group 1 list
Annex D Microorganisms — minimum microbial count (organism serving primary cleaning function)	≥1×10⁷ CFU/mL for liquid products; ≥1×10⁹ CFU/g for solid products (JECFA methods or comparable)	pp. 37-38 Annex D § F
Annex D Microorganisms — spray-packaging requirements (additional)	EFSA Qualified Presumption of Safety (QPS) List species only OR inhalation exposure testing with airborne microorganism concentration ≤10,000 CFU/m³ (A.I.S.E. Spray Protocol 2020); no fungal/mold species; yeasts acceptable	p. 38 Annex D § H

Scope and exclusions (Appendix 1)

Item	Edition 2.6	Source location
Specialty household cleaners INCLUDED in GS-52 scope	Adhesive remover; boat cleaning (hull, bilge); boat wax/polish/sealant/glaze; chewing gum remover; deck/siding/outdoor furniture cleaning; dish cleaning (automatic, hand, rinse agent); antimicrobial pesticide products (disinfectants, sanitizers); drain additive/cleaning; dusting aid; electronic cleaning; fruit and vegetable wash; furniture polish; graffiti remover; grout cleaning; holding tank treatment; leather cleaning; metal cleaning; mold and mildew stain remover; motor vehicle cleaning, dressing, windshield washing fluid, wax/polish/sealant/glaze; odor remover; optical lens cleaning; oven cleaning; pressurized gas dusting; products containing microorganisms; products containing enzymes (sold/designed for non-spray packaging only); recreational vehicle tank treatment; rust stain remover; septic tank treatment; stone cleaning; tire and wheel cleaning; upholstery cleaning; waterless motor vehicle cleaning	pp. 39-40 Appendix 1 included column
Products EXCLUDED from GS-52 scope (and the Green Seal standard that does cover them, when applicable)	Air fresheners (designed to mask odor); cleaners/degreasers marketed for cleaning soils in production and maintenance applications without enzymes or microorganisms (GS-34); dry erase board cleaning products (GS-37); floor finish and finish strippers for industrial and institutional use (GS-40) and for household use; general-purpose, restroom, glass and carpet cleaners for industrial and institutional use with or without enzymes or microorganisms (GS-37); general-purpose, bathroom, glass, and carpet cleaner products marketed specifically for household use with or without enzymes or microorganisms (GS-8); hand cleaning products for industrial and institutional use (GS-41) or household use (GS-44); hand dish cleaning products formulated with antimicrobial agents to support antimicrobial claims; industrial and institutional versions of those included on the left column; laundry care products (included in the standard in development, GS-48); paint remover/thinner products; products that contain enzymes and are sold in, or designed for use in, spray packaging; pump and sewer treatment products; sterilizers or high level disinfectants for critical medical devices	pp. 39-40 Appendix 1 excluded column
Cross-cutting exclusions from § 1.0 Scope	Products covered by GS-8 (routine general purpose, floor, restroom, toilet, glass, carpet cleaning with or without enzymes or microorganisms); products containing enzymes sold/designed for spray packaging; industrial and institutional cleaning products; printing press cleaning; laundry care; air fresheners; sporicides; sterilizers; products used to sterilize critical and semicritical medical devices and equipment	p. 8 § 1.0 Scope

Heavy-metal-specific summary

The standard captures heavy metals through three distinct regulatory mechanisms.

(1) Colorants exclusion (§ 3.21). Each colorant in a formulated specialty household cleaner shall be FDA-certified for ingestion, a natural colorant, OR not have any of nine heavy metals intentionally added: arsenic, cadmium, cobalt, hexavalent chromium, lead, manganese, mercury, nickel, and selenium. The clause does not specify a numerical concentration ceiling; it is a binary prohibition on intentional addition to colorant components. This is the broadest by-name heavy-metal coverage in Edition 2.6 and is identical in metal-set composition to the parallel Colorants clause in GS-37: Green Seal Standard for Cleaning Products for Industrial and Institutional Use — Edition 7.8 (New Format), June 23, 2022 (corrections/clarifications last made August 23, 2024) § 2.1.4.

(2) Prohibited Components in the formulated product (§ 3.18). The undiluted product shall not contain three named heavy metals — lead, hexavalent chromium, or selenium — in either elemental form or compounds. The same three-metal list appears in the parallel GS-37 § 2.1.13 Prohibited Ingredients clause. The footnote 13 (p. 18) anchors the named-list to demonstrated endocrine disruption, neurotoxicity, and systemic toxicity health concerns, and explicitly notes that other chemicals may have such concerns but are not listed because they may already be prohibited through other criteria in the standard. Beyond heavy metals, the GS-52 § 3.18 list includes seven additional categories not present in GS-37 § 2.1.13: halogenated organic solvents, nitro-musks, o-phenylphenol, ozone-depleting compounds, polycyclic musks, TRI PBT chemicals, and triclosan. (GS-37 Edition 7.8 instead adds PFAS as a separate clause § 2.1.10 that is not present in GS-52.) The clause is a binary prohibition on intentional formulation with no numerical concentration threshold reproduced in the standard text.

(3) Packaging Heavy Metal Restrictions in primary packaging (§ 5.5). Lead, mercury, cadmium, and hexavalent chromium shall not be intentionally introduced to primary packaging. The sum of these four metals’ concentrations in the packaging shall not exceed 100 ppm. An exception applies for refillable packages or packages that would not exceed but for the addition of post-consumer material. The Annex A definition of “Intentionally Introduced” (p. 28) carves out processing aids and intermediates that impart certain chemical/physical changes during manufacturing, provided their residual presence in the primary package is below 100 ppm. The 100 ppm sum ceiling is the standard’s single explicit heavy-metal numerical limit and is identical to the parallel clause in GS-37: Green Seal Standard for Cleaning Products for Industrial and Institutional Use — Edition 7.8 (New Format), June 23, 2022 (corrections/clarifications last made August 23, 2024) § 3.3.1. The 100 ppm sum corresponds to the four-metals sum convention used in the U.S. Coalition of Northeastern Governors (CONEG) Model Toxics in Packaging Legislation (1989), adopted by 19+ US states, and in EU Directive 94/62/EC Article 11; Edition 2.6 does not reference those external regulations by name in the Heavy Metal Restrictions sub-clause, but the structural and numerical parallel is direct.

Heavy-metal coverage outside these three by-name clauses operates through the other criterion families on a compound-by-compound basis: Carcinogens and Reproductive Toxins (§ 3.5) covers heavy-metal compounds with IARC Group 1/2A/2B, NTP Group 1/2, EPA IRIS A/B1/B2/C, OSHA CFR 29 §1910.1003(a)(1), or GHS Cat 1A/1B carcinogen classifications, plus California Proposition 65 reproductive toxin classifications; Mutagens and Neurotoxins/Systemic Toxins (§ 3.6) covers heavy-metal compounds meeting GHS Cat 1/2 germ-cell mutagenicity (H340/H341) or GHS Cat 1/2 target-organ toxicity (H370/H371/H372/H373); Endocrine Disruptors (§ 3.7) covers heavy-metal compounds on the EPA List of Chemicals for Tier 1 Screening shown to disrupt hormones (estrogen/androgen-mediated effects per EPA Series 890 Endocrine Disruptor Screening Program Test Guidelines); Skin Absorption (§ 3.11) covers heavy-metal compounds on ACGIH TLV with skin notation or DFG MAK with skin absorption H notation at ≥1% in the product or summing to ≥1% with the same target organ; Toxicity to Aquatic Life (§ 3.14) covers heavy-metal compounds with acute LC50 <100 mg/L; Bioaccumulating Compounds (§ 3.16) covers heavy-metal compounds with BCF ≥500 or log K_ow ≥4.

Other criterion-family additions in Edition 2.6 relevant to heavy-metal-adjacent contamination

Item	Edition 2.6	Source location
Endocrine Disruptors — explicit screening reference	”components that are on the EPA List of Chemicals for Tier 1 Screening that have been shown to disrupt hormones (e.g., have estrogen- or androgen-mediated effects), tested according to the EPA Series 890 — Endocrine Disruptor Screening Program Test Guidelines”	p. 13 § 3.7 Endocrine Disruptors
Antimicrobial Pesticide Products in scope — § 2.3	Any product making antimicrobial, disinfecting, or sanitizing claim shall be a registered antimicrobial pesticide product with no unresolved efficacy failures and no unresolved compliance or enforcement actions, OR a minimum risk pesticide-based product; minimum risk pesticide-based products shall demonstrate efficacy per FIFRA Efficacy Test Protocols; non-US products shall meet appropriate efficacy requirements for the target organism(s)	p. 11 § 2.3 Antimicrobial Pesticide Products
Antimicrobial Agents — § 3.26	Use of antimicrobial agents is permitted only for the preservation or stabilization of the product, except for antimicrobial pesticide products	p. 19 § 3.26 Antimicrobial Agents
Disposable Wipes — § 3.27	Products sold in ready-to-use format may contain disposable towelettes or other disposable single-use materials if the wipes are made from agricultural products, wood pulp, and other cellulosic materials; exception for reusable wipes/towelettes/sheets intended for multiple uses (e.g., three or more)	p. 19 § 3.27 Disposable Wipes
Ingredient threshold	”A constituent that is deliberately added at any level for its continued presence in the final product to provide a specific characteristic, appearance, or quality, or a contaminant that was not deliberately added but is present above 0.01% by weight” — the standard’s working threshold for triggering component-level criteria	p. 26 Annex A Component
Naturally-occurring exemption from “component"	"Naturally occurring elements and chlorinated organics, which may be present as a result of chlorination of the water supply, are not considered components if the concentrations are below the applicable maximum contaminant levels in the National Primary Drinking Water Standards found in 40 CFR Part 141”	p. 26 Annex A Component footnote 18

Methods (brief)

Not applicable in the experimental sense. This is the binding text of a third-party voluntary environmental certification standard, not an analytical study. It does not perform original sampling, analytical measurement, or contamination quantification. The standard does not specify the analytical methods Green Seal uses to verify heavy-metal absence in formulated products or in primary packaging; those audit methods are located in Green Seal’s certification audit procedures, not in the standard text itself. The standard does, however, name the test methods that conformity assessment for each non-metal criterion shall follow.

The standard references the following test-method identifiers in its non-metal criteria (preserved here as scientific-method names Exception 2):

Acute toxicity: existing component-level acute-toxicity data; weighted-average mixture formula TP = (Σ wt_i / TV_i)⁻¹ where TP = toxicity of product, wt_i = weight fraction of component i, TV_i = toxicity value LD50 for component i (§ 3.3, p. 12); pH-based skin/eye corrosivity assumption with pH ≤2.0 or pH ≥11.5 (§ 3.4, p. 12).
Skin sensitization: component-level data, evaluated for components at 0.01% or more in undiluted product (§ 3.10, p. 13).
Skin Absorption screening lists: ACGIH Threshold Limit Value list with skin notation; German Deutsche Forschungsgemeinschaft (DFG) Maximum Allowable Concentrations (MAK) list with H notation (§ 3.11, p. 13).
Endocrine Disruptors screening: EPA List of Chemicals for Tier 1 Screening; EPA Series 890 Endocrine Disruptor Screening Program Test Guidelines (§ 3.7, p. 13).
Chronic inhalation toxicity: OECD Harmonized Integrated Classification System for Human Health and Environmental Hazards of Chemical Substances and Mixtures; NOAEL/LOAEL framework with Haber’s rule (C × t = k) for cross-regime extrapolation (§ 3.13.1, p. 16).
Chamber emissions testing: GREENGUARD Children and Schools Certification Program Method for Measuring and Evaluating Chemical Emissions from Cleaners and Cleaning Maintenance Products and Systems Using Dynamic Environmental Chambers, with inhalation-toxicity criteria as in the method referencing Green Seal Standard GS-37 (§ 3.13.2, pp. 16-17).
Aquatic toxicity: ISO 7346-2 (fish acute); OECD TG 201 (algae); OECD TG 202 (daphnia); OECD TG 203 (fish) (§ 3.14, p. 17).
Biodegradability: primary ready-biodegradability criterion (§ 3.15, p. 17) — ISO 7827, 9439, 10707, 10708, 9408, 14593; OECD Methods 301A-F; or OECD 310. Alternative options for substances not exhibiting ready biodegradability (§ 3.15, pp. 17-18) — OECD 303A Coupled Units Test (DOC removal >90%); ISO 9887 or 9888 or OECD 302A-C (inherent biodegradability with LC50 ≥100 mg/L); EPA BioWin (EpiSuite) QSAR acceptable when experimental data unavailable.
Bioaccumulation: OECD TG 305 preferred source for BCF; biodegradability per § 3.15 may rebut the bioaccumulation classification (§ 3.16, p. 18).
VOC content: California Air Resources Board (CARB) Method 310 (or equivalent), modified to include all fragrances and all volatile organic components present in the product at 0.01% or more (CARB Method 310 itself exempts fragrances and VOCs <0.1%); alternative: summing per-weight contributions from all volatile organic components present in the product at 0.01% or more; VOC threshold defined as vapor pressure >0.1 mm mercury (Hg) at 1 atm and 20 °C (§ 3.12, p. 14 with footnote 11).
Combustibility flashpoint: ASTM D92-05a (Cleveland Open Cup); ISO 13736 (Abel Closed-Cup); ISO 2719 (Pensky-Martens Closed-Cup); ASTM D 4206 (sustained-flame test) (§ 3.19, p. 18).
Antimicrobial efficacy / antimicrobial pesticide product registration: FIFRA registration with no unresolved efficacy failures and no unresolved compliance or enforcement actions; FIFRA Efficacy Test Protocols for minimum risk pesticide-based products; non-US products shall meet appropriate efficacy requirements for the target organism(s) per Health Canada or PMRA where applicable (§ 2.3, p. 11; Annex A Registered Antimicrobial Pesticide Product, pp. 30-31).
Product Performance (§ 2.1):
Deck/siding/outdoor furniture and boat/motor vehicle/tire/waterless motor vehicle cleaning: ≥80% particulate soil removal per ASTM D4488 A5 (note: ASTM D4488 has been withdrawn per footnote 5 p. 9, but is identified as still the best available method, available for purchase, and regularly used by laboratories to test performance).
Motor vehicle wax/polish/sealant/glaze: performance equivalent to or better than control per ASTM D 3836 or ASTM D6625.
Automatic dish cleaning: soil removal per § 2.2 Alternative Performance Requirements with colored bleachable soil, dry starchy soil (amylase-specific), and dry proteinaceous soil (protease-specific); test at 130 ± 5 °F (54.4 ± 3.8 °C) in household machine.
Rinse agent products and combined dish cleaning/rinse agent for automatic dishwashers: visual rating ≥2 per ASTM D3556 or CSPA DCC-05A.
Hand dish cleaning: soil removal per § 2.2 with ASTM D4009 soils B and D (or equivalent); test at 110 °F (43°C) per FDA Food Code regulations (footnote 6).
Furniture polish: gloss, water/smear protection, clean-ability per § 2.2.
Graffiti removers: effectiveness in removing graffiti markings (aerosol paint, felt tip pen, crayon, lipstick) while maintaining substrate appearance per § 2.2.
Metal cleaning: Cleaning Effectiveness Factor (CEF) ≥0.80 per ASTM G122.
Motor vehicle windshield washing fluid: ≥3 rating in each of soil removal, smearing, streaking per CSPA DCC-09; winter formula remains liquid for ≥24 hr at 0°F (-17.8°C).
Optical lens cleaning: ≥3 rating in each of soil removal, smearing, streaking per CSPA DCC-09.
Oven cleaning: ≥90% soil removal in CSPA DCC-12 with test soils A or B.
Upholstery cleaning: cleaning efficiency and resoiling resistance per § 2.2; may use warm/hot water if required by test method or for cold-water performance degradation.
Child-resistant packaging (Annex B alternative): ASTM D3475 classification; testing per ISO 8317 or European Standard EN 862; reference to U.S. Code of Federal Regulations Title 16 Part 1700 and Title 40 Part 157 (Poison Prevention Packaging Act) (Annex A Child-Resistant Packaging, p. 25).
Microbiological methods (Annex D): JECFA Combined Compendium of Food Additive Specifications standard microbiological analytical methods (pathogenic microorganism testing); EPA/Office of Pesticide Programs SOP or AOAC International Use Dilution Method for Testing Disinfectants SOP MB-05-04 (antimicrobial susceptibility); Kirby-Bauer disk method (antibiotic susceptibility); EFSA Qualified Presumption of Safety (QPS) List (spray-packaging permitted species); A.I.S.E. Spray Protocol (2020) (inhalation exposure testing).
Reference scientific-society lists: AOEC (Association of Occupational and Environmental Clinics) asthmagen list; State of California Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65, California Code of Regulations Title 22 Division 2 Subdivision 1 Chapter 3 Sections 1200 et seq.) for reproductive toxin classifications; IARC, NTP, EPA IRIS, OSHA CFR 29 §1910.1003(a)(1) for carcinogen classifications; GHS Category 1 H334 (respiratory sensitization); GHS Category 1A/1B/1C H314 (skin corrosion/irritation); GHS Category 1 H318 (serious eye damage); GHS Category 1 H317 (skin sensitization); GHS Categories 1 and 2 H340/H341 (germ-cell mutagenicity); GHS Categories 1 and 2 H370/H371/H372/H373 (target-organ toxicity); EPA list of Class I and Class II Ozone-Depleting Substances and GHS Category 1 H420 (ozone-layer hazard); National Primary Drinking Water Standards 40 CFR Part 141 (incidental-contaminant carve-out from “component”).
International biosafety designation lists (Annex A WHO Risk Group 1): Australia/New Zealand; Belgium; Switzerland; United Kingdom; Germany; United States Department of Health and Human Services NIH; European Commission; Singapore; Japan.
Trade and labelling standards: International Fragrance Association (IFRA) code of practice; INCI (International Nomenclature of Cosmetic Ingredients) and HCPA Ingredient Dictionary for product label ingredient lines; USDA NOP (National Organic Program) for organic claims.

Speciation. Edition 2.6 maintains the hexavalent-chromium speciation discipline: all three by-name heavy-metal clauses (Colorants § 3.21; Prohibited Components § 3.18; Packaging Heavy Metal Restrictions § 5.5) name “hexavalent chromium” specifically and never name “chromium” without speciation. Arsenic is not speciated (the Colorants clause names “arsenic” without inorganic/total distinction; arsenic does not appear in Prohibited Components or Packaging clauses). Mercury is not speciated (the Colorants and Packaging clauses name “mercury” without inorganic/organic/methyl distinction; mercury does not appear in Prohibited Components).

Basis. The Colorants and Prohibited Components clauses operate as binary prohibitions on intentional formulation with no numerical concentration threshold reproduced in the standard text. The Packaging Heavy Metal Restrictions clause expresses its numerical ceiling as a sum of the four named metals’ concentrations not exceeding 100 ppm by weight in the packaging material; the basis is mass-per-mass of packaging, not of the formulated product within the packaging. Annex A defines “Component” as a constituent deliberately added at any level for continued presence, or a contaminant present above 0.01% by weight of a product. VOC content limits are expressed as percent by weight of the product as used. Eutrophication phosphorus limit is expressed as percent by weight in the product as used. Concentration ratios for specific specialty categories (boat cleaning, motor vehicle cleaning, deck/siding/outdoor furniture cleaning) are expressed as 1:8 minimum concentrate-to-use solution dilution ratios. Acute oral and dermal toxicity thresholds are mass-per-mass body weight (mg/kg). Inhalation LC50 is parts-per-million by volume in air at 1 hr (ppmV). Aquatic LC50 is mass-per-volume in water (mg/L). Annex B’s powder/solid/non-aqueous-liquid alternate threshold of 300 mg/kg replaces the 5,000 mg/kg threshold for the oral LD50 only and does not change the inhalation, dermal, aquatic, or packaging thresholds.

Naturally-occurring elements carve-out. Annex A’s “Component” footnote 18 (p. 26) states that naturally occurring elements (and chlorinated organics from water-supply chlorination) are not considered components if their concentrations are below applicable maximum contaminant levels in the National Primary Drinking Water Standards (40 CFR Part 141). This carve-out is relevant for heavy-metal contaminants entering the product through water inputs or naturally-occurring trace presence in raw materials, distinct from intentional addition.

Implications

The standard documents Green Seal’s current operative regulatory floor for heavy metals in specialty household cleaning products. Heavy-metal coverage operates through three by-name mechanisms (Colorants 9-metal exclusion, Prohibited Components 3-metal list, Packaging 4-metal sum ≤100 ppm) plus indirect compound-by-compound coverage via the Carcinogens, Mutagens/Neurotoxins/Systemic Toxins, Endocrine Disruptors, Skin Absorption, Aquatic Toxicity, and Bioaccumulating Compounds criteria. Downstream HMI synthesis citing GS-52 as a regulatory floor for heavy metals in specialty household cleaning products should differentiate the by-name mechanisms (binary prohibitions on intentional addition / introduction; the 100 ppm packaging sum is the single explicit numerical ceiling) from indirect coverage via the broader criterion families.
GS-52 and the sibling GS-37: Green Seal Standard for Cleaning Products for Industrial and Institutional Use — Edition 7.8 (New Format), June 23, 2022 (corrections/clarifications last made August 23, 2024) use identical by-name heavy-metal mechanisms (same Colorants 9-metal list; same Prohibited Components/Ingredients 3-metal list of lead (Pb), hexavalent chromium (Cr-VI), Se; same Packaging Heavy Metal Restrictions 4-metal sum and 100 ppm ceiling) but address non-overlapping product scopes (specialty household vs industrial/institutional general-purpose/restroom/glass/carpet). Downstream HMI synthesis treating Green Seal as a regulatory baseline for heavy metals in cleaning products should route GS-52 to household specialty product categories and GS-37 to industrial and institutional general-purpose product categories; Green Seal Standard GS-8 (Cleaning Products for Household Use) is the third companion standard covering household general-purpose, restroom, glass, and carpet cleaners.
Edition 2.6 extends the GS-52 Prohibited Components list beyond GS-37’s parallel § 2.1.13 by adding halogenated organic solvents, nitro-musks, o-phenylphenol, ozone-depleting compounds, polycyclic musks, TRI PBT chemicals, and triclosan to the 2-butoxyethanol / alkylphenol ethoxylates / phthalates / Pb-Cr-VI-Se baseline that both standards share. GS-37 Edition 7.8 (June 2022) adds PFAS as a separate § 2.1.10 clause that is not present in GS-52 Edition 2.6 (November 2021). These differences reflect each standard’s product-scope-specific contaminant concerns rather than a Green Seal-wide policy difference; future synthesis comparing the two should treat the broader GS-52 § 3.18 list and the GS-37 PFAS clause as parallel additions rather than as evidence of policy drift.
The 1:8 minimum dilution ratio requirement (§ 3.23) for boat cleaning, motor vehicle cleaning, and deck/siding/outdoor furniture cleaning products is a concentrate-and-dose requirement targeting outdoor/direct-release product categories where rinse water typically bypasses sewage treatment. This is GS-52-specific (GS-37’s § 4.4.1 concentrates clause requires 1:32 for general-purpose cleaners and 1:16 for glass/restroom/carpet cleaners with different in-scope categories). HMI synthesis citing concentrate-and-dose policy in cleaning products should note the by-category granularity rather than treating concentrate requirements as a single Green Seal policy.
The CARB VOC table reproduced at pp. 14-16 of Edition 2.6 is the binding ceiling for product categories regulated by CARB and is the standard’s most extensive quantitative table by row count (26 product-category rows). The table reproduces CARB’s regulatory limits as the binding VOC ceiling and is updated to reflect any future CARB amendments per footnote 12. The table is not a heavy-metal limit; it is the volatile-organic-component limit for the specialty household cleaner formulated product. HMI sessions interpreting Green Seal as a heavy-metal regulatory floor for specialty household cleaning should treat the VOC table as adjacent-but-not-equivalent regulatory coverage.
This standard text is not a primary source for any contamination distribution, occurrence value, or threshold-setting analysis. It is the binding programme document recording what compliance to GS-52 requires. HMTc threshold-setting work on specialty household cleaning product categories should treat this standard as upstream regulatory context, not as a literature contributor to per-analyte percentile calculations.

Limitations

Standard text, not occurrence data. The standard contains no original sampling, no analytical measurements, no contamination distributions, and no by-product occurrence values. It documents what compliance to GS-52 Edition 2.6 requires, not what products actually achieve. Any HMI session reasoning about how many specialty household cleaning products meet the GS-52 numerical limits must consult Green Seal’s certification database (greenseal.org) or independent occurrence surveys, not this standard text.
One explicit heavy-metal numerical limit. The single explicit heavy-metal numerical limit is the § 5.5 Packaging Heavy Metal Restrictions 100 ppm sum-of-concentrations ceiling on the four named metals (Pb + Hg + cadmium (Cd) + Cr-VI) in primary packaging. All other heavy-metal coverage in Edition 2.6 is binary prohibition on intentional addition (Colorants 9-metal exclusion) or intentional formulation (Prohibited Components 3-metal list), or is indirect class-membership gating via the Carcinogens / Reproductive Toxins / Mutagens / Neurotoxins / Systemic Toxins / Endocrine Disruptors / Skin Absorption / Aquatic Toxicity / Bioaccumulating Compounds criterion families. Element-specific numerical concentration ceilings in the formulated product itself are not specified in Edition 2.6.
Audit/verification methodology not in the standard text. The standard does not specify the analytical methods Green Seal uses in compliance verification for heavy-metal absence in formulated products or in primary packaging (e.g., ICP-MS, ICP-OES, GFAAS, XRF for packaging screening), nor LOD/LOQ targets, nor sample-prep digestion protocols. Those methods are in Green Seal’s internal certification audit procedures and are not reproduced in the published standard text.
Scope is specialty household only. The standard explicitly excludes general-purpose, bathroom, glass, and carpet cleaners for household use (those fall under Green Seal GS-8, Cleaning Products for Household Use, which is not yet in the library); the same categories for industrial and institutional use (Green Seal GS-37 — sibling page GS-37: Green Seal Standard for Cleaning Products for Industrial and Institutional Use — Edition 7.8 (New Format), June 23, 2022 (corrections/clarifications last made August 23, 2024)); industrial and institutional versions of any in-scope specialty product; floor finish/strippers (GS-40 for industrial/institutional and unspecified for household); hand cleaners (GS-41 for industrial/institutional, GS-44 for household); cleaners/degreasers in production/maintenance applications (GS-34); dry erase board cleaning (GS-37); laundry care (GS-48 in development); paint remover/thinners; products containing enzymes sold in spray packaging; pump and sewer treatment; air fresheners; sterilizers/sporicides; and sterilization for critical/semicritical medical devices. Readers looking for Green Seal heavy-metal limits on household general-purpose cleaners should also consult GS-8 and the other Green Seal standards listed in Appendix 1, in addition to GS-52.
Withdrawn ASTM D4488 performance method. The Deck/Siding/Outdoor Furniture and Boat/Motor Vehicle/Tire/Waterless Motor Vehicle Cleaning performance criteria (§§ 2.1.1, 2.1.2) reference ASTM D4488 A5, which Green Seal acknowledges in footnote 5 (p. 9) has been withdrawn but is identified as “still the best available method,” is still available for purchase, and is regularly used by laboratories to test performance. Conformity assessment relying on a withdrawn ASTM method is a noted procedural artefact of the standard.
B-tier qualitative source. Evidence tier B because: (i) the binding text of a third-party voluntary environmental certification standard, the operative current reference for Green Seal specialty household cleaner certification; (ii) no original measurements, no analytical methods used by Green Seal in compliance verification, no contamination values; (iii) the one explicit heavy-metal numerical limit (Packaging 100 ppm Pb + Hg + Cd + Cr-VI sum) is reproduced from the standard’s own clause text and is the binding ceiling for GS-52-certified products. B-tier reflects the standard’s binding-text status (vs. the C-tier sibling 2009 GS-37 version-comparison document, which is a comparison artefact rather than the binding text); A-tier is reserved for peer-reviewed occurrence/exposure studies, not for programme standards.
No CAS numbers or compound enumeration for named metals. The Colorants, Prohibited Components, and Packaging Heavy Metal Restrictions clauses name metals at the element level only (“lead”, “mercury”, “cadmium”, “hexavalent chromium”, “arsenic”, “nickel”, “cobalt”, “manganese”, “selenium”) without CAS numbers or compound-class enumeration. The Prohibited Components clause uses “either in the elemental form or compounds” as a speciation qualifier on the three Prohibited Components metals (Pb, Cr-VI, Se). The Colorants and Packaging clauses do not carry that qualifier; “intentionally added” and “intentionally introduced” are the operative tests. HMI sessions interpreting metal coverage at the compound level must default to broad coverage absent narrower specification.
Selenium named in Colorants and Prohibited Components clauses but not in HMI’s metal taxonomy. Selenium is named in two of the three by-name heavy-metal mechanisms in Edition 2.6 (Colorants 9-metal exclusion and Prohibited Components 3-metal list) but is not currently a slug in HMI’s the linked reference record taxonomy. Selenium is therefore omitted from the metals: source metadata array (taxonomy slugs only) and is surfaced as a missing-slug observation in Verification notes; if a the linked reference record page were created, this standard would be a regulatory_context contributor (the same missing-slug pattern as the sibling GS-37 page).
Most GS-52 in-scope product categories not yet in HMI taxonomy. Appendix 1 enumerates 30+ in-scope specialty household categories (adhesive remover, boat cleaning, boat wax, chewing gum remover, deck/siding/outdoor furniture cleaning, electronic cleaning, fruit and vegetable wash, furniture polish, graffiti remover, grout cleaning, holding tank treatment, leather cleaning, metal cleaning, mold and mildew stain remover, motor vehicle cleaning/dressing/windshield washing fluid/wax/polish/sealant/glaze, optical lens cleaning, pressurized gas dusting, recreational vehicle tank treatment, rust stain remover, septic tank treatment, stone cleaning, tire and wheel cleaning, upholstery cleaning, waterless motor vehicle cleaning,…). HMI’s current the linked reference record taxonomy includes only six matches (automatic-dishwasher-detergents; dish-soaps-manual; drain-maintainers-cleaners; odor-removers-hard-surfaces; oven-grill-bbq-cleaners; rinse-aids). The remaining 25+ in-scope categories are surfaced as missing-slug observations in Verification notes; new product pages are Karen’s Step 0 Lock decision and are not created by this ingest.

Provenance

Source PDF: the archived source file
SHA-256: adfeaa5ff87d619c846e9e969f7e7bc5baa5b41cdffeb609c405869b738c9d30
File size: ~624 KB; 41 pages (cover + p. 2 mission + pp. 3-4 Contents + p. 5 Foreword + pp. 6-7 Acronyms + pp. 8-23 main clauses 1-7 + pp. 24-33 Annex A Definitions + pp. 34-35 Annex B Powders/Solids/Non-Aqueous Liquids + p. 36 Annex C Enzymes + pp. 37-38 Annex D Microorganisms + pp. 39-40 Appendix 1 Scope + p. 41 Appendix 2 Naturally Derived Components).
Publisher: Green Seal, Inc. (US-based independent non-profit environmental certifier; founded 1989, Washington DC).
Standard identifier: GS-52 (Green Seal Standard 52). Edition 2.6.
Issuance date: November 11, 2021 (Edition 2.6 issuance; replaces Edition 2.5 from April 8, 2020).
Corrections/clarifications last made: January 28, 2022 (per Foreword, p. 5).
Document title (cover): “GS-52 — Green Seal Standard for Specialty Cleaning Products for Household Use — Edition 2.6 — November 11, 2021”.
Document title (header on every page): “SPECIALTY CLEANING PRODUCTS FOR HOUSEHOLD USE, GS-52”.
DOI: none assigned (programme standard).
License: © 2021 Green Seal, Inc.; per cover page, “Green Seal’s Standards are copyrighted to protect Green Seal’s publication rights. There are no restrictions on using the criteria in the design or evaluation of products.”
Access URL: https://www.greenseal.org/green-seal-standards/library/
Access date: 2026-06-03.
Acquisition path: included in the source-retrieval Agent Download Corruption Issue (KADC) folder household_papers/06_Regulatory_EPA_GreenSeal/, alongside sibling Green Seal documents GS-37: Green Seal Standard for Cleaning Products for Industrial and Institutional Use — Edition 7.8 (New Format), June 23, 2022 (corrections/clarifications last made August 23, 2024) (the binding GS-37 Edition 7.8 standard) and Version Comparison of Green Seal's Environmental Standard for Industrial and Institutional Cleaners, GS-37 — Third Edition (February 27, 2006) vs. Fourth Edition (August 29, 2008) (the 2006-vs-2008 GS-37 version-comparison artefact), plus uningested sibling Green Seal document Green_Seal_GS-8_Household_Cleaners_2022.pdf (the binding GS-8 household general-purpose cleaner standard, also a 2022-corrected ©2021 document), and alongside the broader regulatory/programme set EU Ecolabel User Manual for Detergents and Cleaning Products (Version 1.5, February 2024) — guidance supporting Commission Decisions (EU) 2017/1214, 2017/1215, 2017/1216, 2017/1217, 2017/1218 and 2017/1219, The EU Ecolabel for household detergents — The EU Ecolabel is the official European Union label for environmental excellence, Revision of the EU Ecolabel criteria for Detergent and Cleaning Products — 2nd Ad-hoc Working Group Meeting (12-13 March 2025), Technical Report 2 (TR2) consultation deck, The EU Ecolabel celebrates its 30th birthday! What does the scheme stand for?, EPA's Safer Choice and Design for the Environment (DfE) Standard (August 2024), EPA's Safer Choice Program — Master Criteria for Safer Ingredients (Version 2.1, October 2024), The dirt on toxic chemicals in household cleaning products, NIOSH HHE 2015-0053 (hospital cleaning), California SB258 right-to-know factsheets, NY State Cleaning Product Disclosure Programme, WECF Women and Chemicals briefing, and Bello et al. 2009 occupational exposures in cleaning.

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Cite this page. © 2021 Green Seal, Inc. (programme standard; per cover page Green Seal's Standards are copyrighted to protect publication rights, with no restrictions on using the criteria in the design or evaluation of products)

Download evidence packet

Institute of Contaminant Standards. (2026). GS-52: Green Seal Standard for Specialty Cleaning Products for Household Use, Edition 2.6, November 11, 2021 (corrections/clarifications last made January 28, 2022). Heavy Metal Index. https://heavymetalindex.com/sources/greenseal2022-gs52-specialty-household-cleaners

The evidence packet is a JSON manifest with page checksums, contributing sources, and available data downloads. It states whether the page has a verified Git revision and provides a verification command when available. See methodology and errata for how the underlying evidence is selected and corrected.