Green Seal 2024 — GS-37 Edition 7.8 Standard for Cleaning Products for Industrial and Institutional Use

The binding text of Green Seal’s voluntary environmental certification standard for industrial and institutional general-purpose, restroom, glass, and carpet cleaners. Edition 7.8 (New Format) was issued June 23, 2022, replacing Edition 7.7 from November 11, 2021; the version retrieved (©2024 Green Seal, Inc., file Green_Seal_GS-37_Industrial_Institutional_Cleaners_2024.pdf) carries corrections and clarifications last made on August 23, 2024 per the Foreword (p. 5). The standard is 27 pages organised into 5 main clauses (Scope; Safer Chemicals; Sustainable Packaging; Verified Performance and Claims; Trademark Use Requirements) and 5 normative annexes (Definitions; Closed Dilution-Control System; Powders/Solids/Non-Aqueous Liquids; Enzymes; Microorganisms) plus an informative Appendix 1 enumerating in-scope and out-of-scope product categories.

Heavy-metal coverage in Edition 7.8 operates through three distinct mechanisms within the Safer Chemicals and Sustainable Packaging clauses. First, the Colorants criterion (section 2.1.4) 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 Ingredients criterion (section 2.1.13) 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, and phthalates, with a footnote (p. 9) citing endocrine disruption, neurotoxicity, and systemic toxicity as the basis. Third, the Sustainable Packaging > Restricted Substances > Heavy Metal Restrictions sub-clause (section 3.3.1) 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 (0.01%), 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 3.3.2) prohibits intentional introduction of phthalates, bisphenol A, and chlorinated packaging material to a plastic primary package, with the same post-consumer-material exception. Edition 7.8 also introduces a broad Per- and Polyfluoroalkyl Substances prohibition (section 2.1.10) requiring the undiluted product not to contain any PFAS.

Relative to the Fourth Edition (August 29, 2008) of GS-37 — the prior reference point documented in the sibling source page greenseal2009-gs37-version-comparison — Edition 7.8 retains the same three-metal Prohibited Ingredients list (Pb, Cr-VI, Se) and the same four-metal 100 ppm packaging sum ceiling (Pb + Hg + Cd + Cr-VI), but broadens heavy-metal coverage substantially in three respects: the Colorants nine-metal exclusion (As + Cd + Co + Cr-VI + Pb + Mn + Hg + Ni + Se) is a wholly new criterion in Edition 7.8 that re-introduces by-name coverage of arsenic, cadmium, cobalt, manganese, mercury, and nickel that the 2008 edition had removed from the Prohibited Ingredients list when narrowing from eight named metals to three; the PFAS prohibition in section 2.1.10 is new for 2022; and the packaging Other Restrictions sub-clause adds bisphenol A to the 2008-era phthalates-and-chlorinated-material packaging prohibition. Edition 7.8 also adds wholly new normative Annex D (Enzymes) and Annex E (Microorganisms) with detailed biosafety, strain-identification, and labelling requirements, and tightens the scope to exclude products containing enzymes sold in spray packaging.

This page documents the binding standard text as the operative GS-37 reference. The sibling 2009 version-comparison document at greenseal2009-gs37-version-comparison is the historical 2006-vs-2008 diff and should be cited for the by-edition transitions through 2008; this page is the current operative reference for Green Seal’s industrial and institutional cleaner standard.

Key numbers

Numerical content below is the subset most relevant to HMI synthesis on industrial and institutional cleaning product groups: the three heavy-metal-specific clauses in full, plus the adjacent numerical thresholds (VOC limits, dilution-ratio requirements, oral LD50, vapor-pressure thresholds, biodegradability percentages, BCF, aquatic LC50, eutrophication phosphorus, combustibility flashpoint, post-consumer-material percentage, and the Annex C/D/E thresholds) that contextualise the heavy-metal limits within the standard’s overall quantitative register.

Heavy-metal-specific prohibitions and limits

Non-metal numerical limits (preserved for context)

Normative-annex thresholds

Scope and exclusions (Appendix 1)

Heavy-metal-specific summary

The standard captures heavy metals through three distinct regulatory mechanisms.

(1) Colorants exclusion (Edition 7.8 new criterion, § 2.1.4). Each colorant in a formulated 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 7.8 and reinstates by-name treatment of arsenic, cadmium, cobalt, mercury, and nickel (and adds manganese for the first time in any GS-37 edition documented in HMI) that the 2008 Fourth Edition had removed from the by-name Prohibited Ingredients list when narrowing from eight named metals to three (Pb, Cr-VI, Se).

(2) Prohibited Ingredients in the formulated product (§ 2.1.13). The undiluted product shall not contain three named heavy metals — lead, hexavalent chromium, or selenium — in either elemental form or compounds. The footnote (p. 9) 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 (Skin Absorption per § 2.1.14 against ACGIH-TLV / DFG-MAK skin-notation lists; CMR per § 2.1.3; Skin Sensitization per § 2.1.16; Asthmagens per § 2.1.7; Inhalation Toxicity per § 2.2.3; Toxicity to Aquatic Life per § 2.2.4; Bioaccumulating Compounds per § 2.1.2). 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 (§ 3.3.1). 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 parts per million by weight (0.01%). 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 “Intentional Introduction” (p. 19) 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 the same ceiling carried forward from the 2008 Fourth Edition; 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 7.8 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: CMR (§ 2.1.3) covers heavy-metal compounds with IARC Group 1/2A/2B, NTP Group 1/2, EPA IRIS A/B1/B2/C, or OSHA CFR 29 §1910.1003(a)(1) carcinogen classifications; Skin Absorption (§ 2.1.14) 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; Skin Sensitization (§ 2.1.16) covers heavy-metal compounds testing positive in the LLNA per OECD 429 / OPPTS 870.2600; Toxicity to Aquatic Life (§ 2.2.4) covers heavy-metal compounds with acute LC50 <100 mg/L; Bioaccumulating Compounds (§ 2.1.2) covers heavy-metal compounds with BCF >100 or log BCF >2.

Other criterion-family additions in Edition 7.8 relevant to heavy-metal-adjacent contamination

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 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 per CLAUDE.md Part 14 Exception 2):

• Biodegradability: primary ready-biodegradability criterion (§ 2.1.1 p. 7) — ISO 7827, 9439, 10707, 10708, 9408, 14593; OECD Methods 301A-F; or OECD 310. Alternative options for substances that do not exhibit ready biodegradability (§ 2.1.1 p. 8) — 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 per § 2.1.1 Note.
• Bioaccumulation: ASTM E1022 Standard Guide for Conducting Bioconcentration test with Fishes and Saltwater Bivalve Mollusks; OECD 305 Bioconcentration: Flow-through Fish Test.
• Acute toxicity: OECD Acute Oral Toxicity Test TG 401; OECD Acute Inhalation Toxicity Test TG 403; weighted-average mixture formula TP = (Σ wt_i / TV_i)⁻¹ where TP = toxicity of product, wt_i = weight fraction of ingredient i, TV_i = toxicity value LD50 for ingredient i.
• Skin sensitization: Local Lymph Node Assay (LLNA) per OECD Guideline 429 / OPPTS 870.2600; guinea pig maximization test or Buehler test per OECD Guideline 406 accepted when LLNA data unavailable.
• Skin Absorption screening lists: ACGIH Threshold Limit Value list with skin notation; German Deutsche Forschungsgemeinschaft (DFG) Maximum Allowable Concentrations (MAK) list with H notation.
• 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.
• Aquatic toxicity: ISO 7346-2 (fish acute); OECD 201 (algae); OECD 202 (daphnia); OECD 203 (fish).
• VOC content: California Air Resources Board (CARB) Method 310 modified to include all fragrances and all volatile organic ingredients (Method 310 itself exempts fragrances and VOCs <0.1%); alternative: summing per-weight contributions from all volatile organic ingredients; VOC threshold defined as vapor pressure >0.1 mm Hg at 1 atm and 20 °C.
• 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).
• Performance testing: ASTM D4488 A5 (general-purpose cleaner particulate soil removal — note ASTM D4488 has been withdrawn but is identified by Green Seal as still the best available method, available for purchase, per p. 14 footnote 6); ASTM D5343 (restroom cleaner soil removal); HCPA method DCC 09 (glass cleaner soil removal, smearing, streaking); WoolSafe or Carpet and Rug Institute Cleaning Solutions Seal of Approval accepted as equivalent for carpet cleaners.
• Chamber emissions testing: GREENGUARD Gold Certification Program Method for Measuring and Evaluating Chemical Emissions from Cleaners and Cleaning Maintenance Systems Using Dynamic Environmental Chambers (office, school, restroom models).
• Closed dilution-control system backflow: ASSE 1055B standard (American Society of Sanitary Engineering).
• Child-resistant packaging (Annex C 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).
• Microbiological methods (Annex E): 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); EPA list of Class I and Class II Ozone-Depleting Substances; National Primary Drinking Water Standards 40 CFR Part 141 (incidental-contaminant carve-out from “intentional component”).
• Statistical / formula references: Weighted-average mixture toxicity (cited above); 40 CFR Part 141 incidental-water-chlorination carve-out.
• 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.

Speciation. Edition 7.8 maintains the hexavalent-chromium speciation discipline that Edition 4 (2008) introduced: all three by-name heavy-metal clauses (Colorants § 2.1.4; Prohibited Ingredients § 2.1.13; Packaging Heavy Metal Restrictions § 3.3.1) 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 Ingredients 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 Ingredients).

Basis. The Colorants and Prohibited Ingredients 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 (0.01%) in the packaging material; the basis is mass-per-mass of packaging, not of the formulated product within the packaging. Annex A defines “ingredient” as ≥0.01% by weight of a product (whether intentional or contaminant). VOC content limits are expressed as percent by weight of the product as used. Eutrophication phosphorus limit is expressed as percent by weight of total phosphorus in the product as used. Concentration ratios are expressed as dilution ratios (1:32, 1:16) of concentrate to use solution. Acute oral toxicity threshold is mass-per-mass body weight (mg/kg). Inhalation LC50 is mass-per-volume in air (mg/L at 1 hr). Aquatic LC50 is mass-per-volume in water (mg/L). Annex C’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, aquatic, or packaging thresholds.

Naturally-occurring elements carve-out. Annex A’s “Component” footnote (p. 18) states that naturally occurring elements (and chlorinated organics from water-supply chlorination) are not considered intentional 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 industrial and institutional cleaning products. Heavy-metal coverage operates through three by-name mechanisms (Colorants 9-metal exclusion, Prohibited Ingredients 3-metal list, Packaging 4-metal sum ≤100 ppm) plus indirect compound-by-compound coverage via the CMR, Skin Absorption, Skin Sensitization, Acute Toxicity, Inhalation Toxicity, Aquatic Toxicity, and Bioaccumulating Compounds criteria. Downstream HMI synthesis citing GS-37 as a regulatory floor for heavy metals in industrial and institutional 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.
• Relative to the 2008 Fourth Edition (documented in greenseal2009-gs37-version-comparison), Edition 7.8 substantially broadens by-name heavy-metal coverage through the new Colorants clause’s nine-metal exclusion. The 2008 narrowing of the Prohibited Ingredients list from eight metals (As, Pb, Cd, Co, Cr, Hg, Ni, Se) to three (Pb, Cr-VI, Se) is preserved in Edition 7.8 for the formulated-product Prohibited Ingredients clause; but the by-name treatment of arsenic, cadmium, cobalt, manganese, mercury, and nickel that disappeared from Prohibited Ingredients in 2008 reappears in Edition 7.8 within the Colorants clause specifically. Future HMI synthesis treating GS-37 as a heavy-metal reference for industrial and institutional cleaning products should make the by-clause distinction explicit.
• Edition 7.8 introduces PFAS as a wholly new class prohibition (§ 2.1.10), the first PFAS coverage documented in any GS-37 edition in HMI. The PFAS prohibition is heavy-metal-adjacent rather than directly heavy-metal but is co-located in the same Safer Chemicals clause and is part of the standard’s broader contaminant-class regulation.
• Edition 7.8 adds bisphenol A to the packaging Other Restrictions clause alongside the 2008-era phthalates and chlorinated-packaging-material prohibition, again documenting the standard’s expansion to cover endocrine-disrupting contaminants beyond the metals-specific mechanisms.
• The standard’s reliance on the OECD Harmonized Integrated Classification System (Chronic Inhalation Toxicity), GHS hazard classifications (Skin Corrosion H314, Serious Eye Damage H318, Respiratory Sensitization H334), and the ACGIH-TLV / DFG-MAK / IARC / NTP / EPA IRIS / OSHA carcinogen lists is the standard’s mechanism for capturing heavy-metal compounds (and other hazard-classified substances) without enumerating them individually. HMI sessions evaluating the standard’s heavy-metal coverage should treat the by-name clauses (Colorants, Prohibited Ingredients, Packaging) as a baseline and recognize that hexavalent chromium compounds, lead compounds, cadmium compounds, arsenic compounds, mercury compounds, nickel compounds, cobalt compounds, and manganese compounds with appropriate hazard classifications are gated by the broader criterion families regardless of by-name listing.
• 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-37 requires. HMTc threshold-setting work on industrial and institutional 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-37 Edition 7.8 requires, not what products actually achieve. Any HMI session reasoning about how many industrial and institutional cleaning products meet the GS-37 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 § 3.3.1 Packaging Heavy Metal Restrictions 100 ppm sum-of-concentrations ceiling on the four named metals (Pb + Hg + Cd + Cr-VI) in primary packaging. All other heavy-metal coverage in Edition 7.8 is binary prohibition on intentional addition (Colorants 9-metal exclusion) or intentional formulation (Prohibited Ingredients 3-metal list), or is indirect class-membership gating via the CMR / Skin Absorption / Skin Sensitization / Acute Toxicity / Inhalation Toxicity / Aquatic Toxicity / Bioaccumulating Compounds criterion families. Element-specific numerical concentration ceilings in the formulated product itself are not specified in Edition 7.8.
• 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 industrial and institutional only. The standard explicitly excludes household versions of any in-scope industrial/institutional product (those fall under Green Seal GS-8); air fresheners; cleaners required to be registered under FIFRA (sterilizers, disinfectants, sanitizers); dish, oven, metal, motor vehicle, deck/outdoor furniture, boat, graffiti remover, furniture polish, specialty, upholstery cleaning (GS-52, GS-53); cleaners/degreasers for production/maintenance applications (GS-34); floor finish/strippers (GS-40); hand cleaners (GS-41, GS-44); laundry care; paint removers/thinners; and products with enzymes in spray packaging. HMI sessions seeking Green Seal heavy-metal coverage for household-versus-industrial product splits should consult GS-8 (household cleaners — sibling KADC file Green_Seal_GS-8_Household_Cleaners_2022.pdf), GS-52 (specialty household cleaners — sibling KADC file Green_Seal_GS-52_Specialty_Household_Cleaners_2022.pdf), and the other Green Seal standards listed in Appendix 1 in addition to GS-37.
• Withdrawn ASTM D4488 performance method. The General-Purpose Cleaners performance criterion (§ 4.1.1) references ASTM D4488 A5, which Green Seal acknowledges in footnote 6 (p. 14) has been withdrawn but is identified as “still the best available method” and available for purchase. 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 industrial and institutional 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-37-certified products. B-tier reflects the standard’s binding-text status (vs. the C-tier sibling 2009 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 Ingredients, 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 Ingredients clause uses “either in the elemental form or compounds” as a speciation qualifier on the three Prohibited Ingredients 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 Ingredients clauses but not in HMI’s metal taxonomy. Selenium is named in two of the three by-name heavy-metal mechanisms in Edition 7.8 (Colorants 9-metal exclusion and Prohibited Ingredients 3-metal list) but is not currently a slug in HMI’s wiki/metals/ taxonomy. Selenium is therefore omitted from the metals: frontmatter array per CLAUDE.md Part 14 (taxonomy slugs only) and is surfaced as a missing-slug observation in Verification notes; if a wiki/metals/selenium.md page were created, this standard would be a regulatory_context contributor.

Provenance

• Source PDF: raw/manual-fetch/Kimi_Agent_Download Corruption Issue/household_papers/06_Regulatory_EPA_GreenSeal/Green_Seal_GS-37_Industrial_Institutional_Cleaners_2024.pdf
• SHA-256: 179d98b1757ad60c3b12cd121b930020e7ecd105bbd87379b1b1e99aefa6f8ed
• File size: ~684 KB; 27 pages (cover + p. 2 mission + pp. 3-4 Contents + p. 5 Foreword + p. 6 Acronyms + pp. 7-16 main clauses 1-5 + pp. 17-21 Annex A Definitions + p. 22 Annex B Closed Dilution-Control + p. 23 Annex C Powders/Solids/Non-Aqueous Liquids + p. 24 Annex D Enzymes + pp. 25-26 Annex E Microorganisms + p. 27 Appendix 1 Scope).
• Publisher: Green Seal, Inc. (US-based independent non-profit environmental certifier; founded 1989, Washington DC).
• Standard identifier: GS-37 (Green Seal Standard 37). Edition 7.8 (New Format).
• Issuance date: June 23, 2022 (Edition 7.8 issuance; replaces Edition 7.7 from November 11, 2021).
• Corrections/clarifications last made: August 23, 2024 (per Foreword, p. 5).
• Document title (cover): “GS-37 — Green Seal Standard for Cleaning Products for Industrial and Institutional Use — Edition 7.8 (New Format)“.
• Document title (header on every page): “INDUSTRIAL AND INSTITUTIONAL CLEANING PRODUCTS, GS-37”.
• DOI: none assigned (programme standard).
• License: © 2024 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 Kimi Agent Download Corruption Issue (KADC) folder household_papers/06_Regulatory_EPA_GreenSeal/, alongside sibling Green Seal documents greenseal2009-gs37-version-comparison (the 2006-vs-2008 GS-37 version-comparison artefact) plus uningested sibling Green Seal documents (Green_Seal_GS-52_Specialty_Household_Cleaners_2022.pdf; Green_Seal_GS-8_Household_Cleaners_2022.pdf), and alongside the broader regulatory/programme set ec2024-eu-ecolabel-user-manual-detergents, ral2024-eu-ecolabel-factsheet-household-detergents, jrc2025-eu-ecolabel-revision-detergents-tr2-ahwg2, eeb2022-eu-ecolabel-30-year-briefing, epa2024-safer-choice-standard-dfe, epa2024-safer-choice-master-criteria-ingredients, davidsuzuki2014-toxic-household-cleaners, 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.

Wiki pages this source may touch

• all-purpose-cleaners — within the GS-37 scope (“general-purpose cleaner and multi-purpose cleaning products”; “general-purpose surface degreasers”, Appendix 1 p. 27; § 4.1.1 General-Purpose Cleaners performance criterion ≥80% particulate soil removal per ASTM D4488 A5). Routed as regulatory_context: all three by-name heavy-metal mechanisms apply (Colorants 9-metal exclusion; Prohibited Ingredients 3-metal list; Packaging Heavy Metal Restrictions 100 ppm Pb+Hg+Cd+Cr-VI sum). The HMI product slug all-purpose-cleaners is the closest taxonomy match to GS-37’s “general-purpose cleaner” / “multi-purpose cleaning products” scope language; HMI does not currently have an industrial/institutional sub-slug, so the household-side slug is the routing target with the industrial/institutional qualifier captured in the source-page context.
• bathroom-tub-tile-cleaners — within the GS-37 scope (“restroom cleaner products”, Appendix 1 p. 27; § 4.1.2 Restroom Cleaners performance criterion ≥75% soil removal per ASTM D5343). Routed as regulatory_context. Same heavy-metal coverage as above. HMI’s bathroom-tub-tile-cleaners slug is the closest taxonomy match to GS-37’s “restroom cleaner” scope (the standard uses “restroom” terminology consistent with industrial/institutional context; HMI’s household-side bathroom-tub-tile-cleaners is the closest available routing target).
• window-glass-mirror-cleaners — within the GS-37 scope (“glass cleaner and mirror cleaning products”, Appendix 1 p. 27; § 4.1.4 Glass Cleaners performance criterion ≥3 rating in each of HCPA DCC 09 categories: soil removal, smearing, streaking). Routed as regulatory_context. Same heavy-metal coverage. VOC ceiling (≤1% or CARB limit, whichever lower) applies to glass cleaners specifically per § 2.2.5.
• carpet-cleaners — within the GS-37 scope (“carpet cleaner products”, Appendix 1 p. 27; § 4.1.3 Carpet Cleaners performance criterion pH 3-10 with Alternative Performance Requirements per § 4.2 or WoolSafe/CRI Cleaning Solutions Seal of Approval). Routed as regulatory_context. Same heavy-metal coverage. CARB VOC limits 0.1% (dilutable, effective 1/1/2001) and 1% (ready-to-use, effective 12/31/2010).
• carpet-spot-removers — within the GS-37 scope (“carpet spot cleaning products”, Appendix 1 p. 27). Routed as regulatory_context. Same heavy-metal coverage. CARB VOC limit 3% (spot removers, effective 12/31/2012). Note: products solely labelled as carpet spot removers are exempt from the § 4.4.1 Concentrates requirement (1:16 dilution ratio for glass/restroom/carpet cleaners).
• toilet-bowl-cleaners — within the GS-37 scope (“toilet or urinal cleaning products”, Appendix 1 p. 27). Routed as regulatory_context. Same heavy-metal coverage. Toilet bowl/urinal cleaners exempt from § 4.4.1 Concentrates requirement; if used for toilet bowl/urinal cleaning, restroom cleaner must also demonstrate water-hardness stain-removal efficacy per § 4.1.2.
• degreasers — within the GS-37 scope (“general-purpose surface degreasers”, Appendix 1 p. 27). Routed as regulatory_context. Same heavy-metal coverage. Note: Appendix 1 excludes cleaners/degreasers for production and maintenance applications, which fall under GS-34.
• floor-cleaners-hard-surface — within the GS-37 scope (“floor cleaning products”, Appendix 1 p. 27). Routed as regulatory_context. Same heavy-metal coverage. Note: Appendix 1 excludes floor finish and finish strippers, which fall under GS-40.
• lead — named in ALL THREE by-name heavy-metal clauses: Colorants (§ 2.1.4, p. 9), Prohibited Ingredients (§ 2.1.13, p. 9, “lead … either in the elemental form or compounds”), and Packaging Heavy Metal Restrictions (§ 3.3.1, p. 14, among the four named metals subject to the 100 ppm sum ceiling). Routed as regulatory_context. Edition 7.8 maintains lead as the heavy metal with the broadest by-name coverage in GS-37.
• mercury — named in the Colorants clause (§ 2.1.4, p. 9) and in the Packaging Heavy Metal Restrictions clause (§ 3.3.1, p. 14, among the four-metal sum); NOT named in the Prohibited Ingredients clause (§ 2.1.13). Routed as regulatory_context. Edition 7.8 re-introduces by-name mercury coverage in the formulated product via the new Colorants criterion, restoring coverage that the 2008 Fourth Edition had removed from Prohibited Ingredients.
• cadmium — named in the Colorants clause (§ 2.1.4) and in the Packaging Heavy Metal Restrictions clause (§ 3.3.1); NOT named in the Prohibited Ingredients clause. Routed as regulatory_context. Same by-edition coverage pattern as mercury.
• chromium-hexavalent — named in ALL THREE by-name heavy-metal clauses: Colorants (§ 2.1.4, “hexavalent chromium”), Prohibited Ingredients (§ 2.1.13, “hexavalent chromium … either in the elemental form or compounds”), and Packaging Heavy Metal Restrictions (§ 3.3.1, among the four-metal sum). Routed as regulatory_context. Edition 7.8 maintains the hexavalent-chromium speciation discipline introduced in the 2008 Fourth Edition; “chromium” without speciation does not appear by name in Edition 7.8.
• arsenic — named in the Colorants clause (§ 2.1.4) only; NOT named in Prohibited Ingredients or Packaging Heavy Metal Restrictions clauses. Routed as regulatory_context. Edition 7.8 re-introduces by-name arsenic coverage via the new Colorants criterion, restoring coverage that the 2008 Fourth Edition had removed from Prohibited Ingredients.
• nickel — named in the Colorants clause (§ 2.1.4) only. Routed as regulatory_context. Same re-introduction pattern as arsenic.
• cobalt — named in the Colorants clause (§ 2.1.4) only. Routed as regulatory_context. Same re-introduction pattern as arsenic.
• manganese — named in the Colorants clause (§ 2.1.4) only. Routed as regulatory_context. New for Edition 7.8 vs the 2008 Fourth Edition documented in greenseal2009-gs37-version-comparison: manganese is not named in either the 2006 Third Edition or the 2008 Fourth Edition Prohibited Ingredients clauses; the Colorants 9-metal list in Edition 7.8 is the first by-name manganese coverage in any GS-37 edition currently documented in HMI.

Verification notes

• Identity-check results on 2026-06-03 against wiki/sources/: DOI null (programme standard, no DOI assigned); raw_handle grep for KADC_green-seal-gs-37-industrial-institutional-cleaners returned no existing matches; cite-key grep for variants greenseal2024, greenseal-gs37, gs-37-industrial, gs37-edition-7, and green-seal-gs-37 returned no existing matches for the binding-standard-text source (only the sibling 2009 version-comparison document at greenseal2009-gs37-version-comparison is present, which is a separate source per its own verification notes flagging this 2024 standard text as a pending NEW source candidate). Ingested as NEW. Sibling Green Seal documents (GS-52 specialty household cleaners 2022, GS-8 household cleaners 2022) are present in the same KADC folder but are not yet ingested; they would be separate NEW source pages.
• SHA-256 of the source PDF was computed from disk on 2026-06-03 (179d98b1757ad60c3b12cd121b930020e7ecd105bbd87379b1b1e99aefa6f8ed).
• The document has no DOI (programme standard, not a journal article). doi is null and no_doi_assigned: true.
• Evidence tier set to B on the basis of: (i) the binding text of a third-party voluntary environmental certification standard, the operative current reference for Green Seal industrial and institutional cleaner certification (this distinguishes it from the C-tier sibling 2009 version-comparison document, which is a comparison artefact rather than the binding text); (ii) no original measurements, no analytical methods, no contamination values; (iii) the one explicit heavy-metal numerical limit (Packaging 100 ppm Pb+Hg+Cd+Cr-VI sum) is the binding ceiling for GS-37-certified products; (iv) A-tier is reserved for peer-reviewed occurrence/exposure studies, not for programme standards.
• Source type set to regulatory-standard. The document is the binding text of a third-party voluntary environmental certification standard. It is not a peer-reviewed paper, not a Commission Decision or government regulation, not an NGO briefing, not a consultation deck, not a user manual, and not a version-comparison artefact (the sibling 2009 document carries regulatory-standard-comparison for that distinction).
• Year field set to 2024 to reflect the version retrieved (©2024 Green Seal, Inc.; corrections/clarifications last made August 23, 2024). The underlying Edition 7.8 was originally issued June 23, 2022; this is captured in the publication and title fields and throughout the body. The cite_key greenseal2024-gs37-industrial-institutional-cleaners follows the same Karen/Claude convention used for the sibling greenseal2009-gs37-version-comparison (year reflects the document version retrieved, not the underlying edition issuance).
• License set to ”© 2024 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)” reflecting the cover-page copyright notice verbatim.
• metals: ["[[metals/lead]]", "[[metals/mercury]]", "[[metals/cadmium]]", "[[metals/chromium-hexavalent]]", "[[metals/arsenic]]", "[[metals/nickel]]", "[[metals/cobalt]]", "[[metals/manganese]]"] because every metal in this list is by-name named in at least one of the three by-name heavy-metal clauses (Colorants § 2.1.4; Prohibited Ingredients § 2.1.13; Packaging Heavy Metal Restrictions § 3.3.1). Selenium is named in BOTH the Colorants clause and the Prohibited Ingredients clause but is NOT in HMI’s metal taxonomy snapshot (no wiki/metals/selenium.md); selenium is therefore omitted from the metals: array per CLAUDE.md Part 14 (taxonomy slugs only) and surfaced as a missing-slug observation below. [[metals/chromium]] is NOT included because Edition 7.8 names “hexavalent chromium” specifically in all three by-name clauses (Colorants, Prohibited Ingredients, Packaging Heavy Metal Restrictions) and does not name “chromium” without speciation; this is distinct from the sibling 2009 page where both chromium and chromium-hexavalent are included because the 2006 Third Edition prohibited “chromium” (umbrella) and the 2008 Fourth Edition narrowed to “hexavalent chromium” (specific). 2-butoxyethanol, alkylphenol ethoxylates, phthalates, bisphenol A, and PFAS are organic-substance additions to the Prohibited Ingredients / Packaging clauses, not metals, and are not added to the metals: array.
• ingredients: [] because the source is a programme standard that names categories of substances (heavy metals, alkylphenol ethoxylates, phthalates, 2-butoxyethanol, ozone-depleting compounds, optical brighteners, PFAS, bisphenol A, chlorinated packaging material, titanium dioxide-with-enzyme-exception) but not food or personal-care ingredients in HMI’s ingredient taxonomy (which is a food-ingredient taxonomy per the taxonomy snapshot). No new ingredient pages created (per skill hard constraints).
• products lists eight existing product slugs covering the GS-37 in-scope categories from Appendix 1: all-purpose-cleaners (general-purpose / multi-purpose); bathroom-tub-tile-cleaners (restroom); window-glass-mirror-cleaners (glass / mirror); carpet-cleaners (carpet); carpet-spot-removers (carpet spot cleaning); toilet-bowl-cleaners (toilet / urinal); degreasers (general-purpose surface degreasers); floor-cleaners-hard-surface (floor cleaning). All eight slugs already exist in wiki/products/ per the taxonomy snapshot; no new product pages created (per skill hard constraints). Appendix 1 also includes “dry erase board cleaning products” and “products that contain microorganisms” / “products that contain enzymes sold/designed for non-spray packaging” as in-scope categories; there is no current HMI product slug for dry-erase-board cleaners (this would be a new-page candidate via Karen’s Step 0 Lock, and is NOT created per skill hard constraints) and the enzyme/microorganism subcategories are cross-cutting product-formulation distinctions rather than distinct product types, so they are not separately routed.
• matrices: [] because the source is a multi-product-category programme standard without a single matrix focus. No new matrix slug is proposed.
• jurisdictions: [US] because Green Seal, Inc. is a US-based non-profit and GS-37 is a US voluntary environmental standard. Green Seal certifications are accepted internationally but the standard itself is published from a US programme.
• near_duplicates: [] because the sibling greenseal2009-gs37-version-comparison is a substantively different document (version-comparison artefact of 2006 vs 2008 editions, not the binding standard text of any edition) and the GS-52, GS-8 standards in the same KADC folder are for different product scopes (specialty household cleaners; household cleaners). No near-duplicate found within wiki/sources/.
• Wiki/HMTc firewall (Part 2): the standard does not propose threshold values for HMTc certification, and this page’s Implications section does not propose any. GS-37 is referenced as the operative regulatory floor for industrial and institutional cleaning products with explicit caveats that the standard text contains no occurrence data and no analytical methods for compliance verification. The 100 ppm packaging-metals sum ceiling and all other numerical thresholds in the standard are reproduced as regulatory facts; this page makes no claim that any GS-37 numerical limit is a science-based HMI synthesis value or an HMTc threshold proposal. The standard’s footnoted basis for the Prohibited Ingredients heavy-metal list (endocrine disruption, neurotoxicity, systemic toxicity) is reproduced verbatim from the source footnote and is the standard’s own justification, not an HMI synthesis claim. No Part 2 drift risk.
• Brand firewall (Part 12): the standard names test-method identifiers (ASTM, ISO, OECD, OPPTS, EPA, CARB Method 310, GREENGUARD Gold, JECFA, AOAC, A.I.S.E. Spray Protocol, ASSE 1055B, EN 862, AOEC), regulatory and standards bodies (Green Seal, FDA, EPA, ACGIH, DFG, OECD, CARB, WHO, EFSA, IARC, NTP, OSHA, Society of the Plastics Industry, Carpet and Rug Institute, HCPA, A.I.S.E., NIH, AISE), screening lists (ACGIH TLV, DFG MAK, EPA IRIS, OSHA CFR 29 §1910.1003(a)(1), GHS, EFSA QPS, California Proposition 65), and certification-programme references (GREENGUARD Gold; WoolSafe; CRI Cleaning Solutions Seal of Approval) — all of which are scientific-method or regulatory references rather than commercial brand attribution to contamination values. Per CLAUDE.md Part 14 Exception 2 (scientific-method vendor/material names locked 2026-05-17), these are PERMITTED. The standard does not name any commercial brand of cleaning product. No brand-firewall action required.
• Quantitative content reproduced on this page (Colorants 9-metal list; Prohibited Ingredients 3-metal list; Packaging Heavy Metal Restrictions 4-metal list and 100 ppm sum ceiling; PFAS prohibition; bisphenol A packaging addition; VOC limits by product-category from CARB regulatory table; acute oral LD50 5,000 mg/kg ceiling and Annex C 300 mg/kg alternate; inhalation LC50 20 mg/L at 1 hr; Chronic Inhalation Toxicity NOAEL 1.0 mg/L vapor / Haber’s rule extrapolation / LOAEL 10× safety factor; vapor pressure thresholds 0.1 mm Hg for VOC definition and 1 mm Hg for inhalation-tox; Bioaccumulating Compounds BCF >100 / log BCF >2; Eutrophication 0.5% phosphorus; Toxicity to Aquatic Life LC50 ≥100 mg/L; Combustibility 150 °F flashpoint; concentrates 1:32 / 1:16; performance ≥80% / ≥75% / ≥3 rating; pH 3-10 for carpet / pH 2.0-11.5 for skin/eye corrosivity assumption; aquatic biodegradability OECD 28-day-test percentages; post-consumer-material 25%; biodegradability alternative DOC removal 90%; Annex C 48-inch drop test and 4 drops; Annex D enzyme encapsulated-solid 0.15 mm diameter floor; Annex E GMM 0.01% threshold and microbial counts 1×10⁷ CFU/mL and 1×10⁹ CFU/g and spray-packaging 10,000 CFU/m³ ceiling; Ingredient threshold 0.01% by weight) is reproduced from the source PDF (pp. 1-27) with page locators. No numerical heavy-metal limits beyond the Packaging 100 ppm sum are stated in the source and none are claimed here. No quantitative content is invented or extrapolated.
• No new ingredient, product, or matrix pages were created during this ingest, per CLAUDE.md Part 10 and the skill’s hard constraints. All product slugs in the frontmatter are existing taxonomy.
• Missing-slug observations surfaced for Karen (not created by this ingest; for future Step 0 Lock or auto-stub decisions):
  • metals/selenium — named in BOTH the Colorants clause (§ 2.1.4) AND the Prohibited Ingredients clause (§ 2.1.13) of Edition 7.8, AND in both editions of the sibling 2009 version-comparison document. Selenium is not currently in HMI’s metal taxonomy snapshot. If a wiki/metals/selenium.md page were created, this standard would be a regulatory_context contributor; this is a freq-2+ candidate (two-clause coverage in this single source, plus prior 2009 page coverage in two earlier editions).
  • regulations/green-seal-gs-37 — the underlying GS-37 standard (Edition 7.8 documented here; prior editions documented in greenseal2009-gs37-version-comparison). Green Seal’s industrial and institutional cleaner standard is the operative regulatory document; no regulations/green-seal-* slugs currently exist.
  • regulations/coneg-model-toxics-in-packaging-1989 — the U.S. Coalition of Northeastern Governors Model Toxics in Packaging Legislation (1989) sets the same 100 ppm sum-of-concentrations ceiling on the same four metals (Pb + Hg + Cd + Cr-VI) in packaging that GS-37 § 3.3.1 adopts. Not referenced by name in this standard, but the structural and numerical parallel is direct.
  • regulations/eu-directive-94-62-ec-packaging — EU Directive 94/62/EC Article 11 sets a 100 ppm sum-of-concentrations ceiling on the same four metals in packaging in the EU. Not referenced by name in this standard but is the parallel international regulation for the same metals-in-packaging mechanism.
  • products/dry-erase-board-cleaners — Appendix 1 (p. 27) names “dry erase board cleaning products” as a distinct in-scope category. No HMI product slug currently exists for dry-erase-board cleaners specifically. Not created here.
  • products/restroom-cleaners — the standard uses “restroom” terminology throughout, distinct from household-side “bathroom” terminology. HMI’s current taxonomy maps both to bathroom-tub-tile-cleaners; if a separate industrial/institutional restroom-cleaners slug were desired, the slug does not currently exist. Not created here. None of those underlying regulations or alternate slugs are created here. The HMI metal selenium page in particular is a freq-2+ candidate (two-clause coverage in this single source) but new metal pages are Karen’s decision.
• The PDF is 27 pages including the cover page, mission statement, contents (pp. 3-4), Foreword (p. 5), Acronyms (p. 6), main standard text (pp. 7-16), Annexes A-E (pp. 17-26), and Appendix 1 (p. 27). All 27 pages were read in full during ingest (pp. 1-10 in the first read pass, pp. 11-20 in the second, pp. 21-27 in the third). All five normative annexes were read in full. The CARB regulatory limits table (p. 12 split across pp. 12-13) was read in full and reproduced in Key numbers.
• This page is manual_phase1 ingest by Claude Opus 4.7 on 2026-06-03.
• Audit subagent (fresh-context general-purpose subagent, 2026-06-03) returned verdict REVISE with three Check 1 numerical-fidelity ⚠️ findings (Checks 2, 3, 4, 5 all ✅ clean); verified independently against the PDF and applied:
  • Finding 1 (Check 1 ⚠️): Eutrophication Key-numbers row read “<0.5% by weight” (strict inequality), but PDF p. 11 § 2.2.2 reads “shall not contain more than 0.5% by weight of total phosphorus” (i.e., ≤0.5%, inclusive of boundary). Verified against PDF p. 11; corrected the row to “≤0.5% by weight” with the verbatim source phrasing preserved in parentheses.
  • Finding 2 (Check 1 ⚠️): Methods (brief) biodegradability bullet conflated two distinct test-method lists into one undifferentiated list — primary ready-biodegradability criterion methods (ISO 7827, 9439, 10707, 10708, 9408, 14593; OECD 301A-F; OECD 310) from PDF p. 7 § 2.1.1 primary criterion, and alternative-option methods (ISO 9887, 9888; OECD 302A-C; OECD 303A Coupled Units Test) from PDF p. 8 § 2.1.1 Alternative Evaluation Options. All eight ISO identifiers do appear in the source, but the conflation obscured the primary-vs-alternative structure. Verified against PDF pp. 7-8; split the bullet to separate primary from alternative methods with their respective DOC-removal / LC50 thresholds.
  • Finding 3 (Check 1 ⚠️): Inhalation toxicity vapor-pressure threshold Key-numbers row cited source location as “p. 11 § 2.2 inhalation-tox carve-in” — imprecise clause attribution. Verified against PDF p. 11: the 1 mm Hg threshold first appears as the closing sentence of § 2.2.1 Acute Toxicity (“Inhalation toxicity shall be determined from all ingredients with a vapor pressure greater than 1 mm Hg at ambient conditions (1 atm pressure and 20-25° C)”) and is re-asserted at § 2.2.3.1 Chronic Inhalation Toxicity (“a vapor pressure above 1 mm mercury (1 atm pressure and 20-25° C)”). Tightened the row’s section reference to point to both locations with § 2.2.1 as the originating clause.
  • Audit checks 2 (slug vocabulary), 3 (speciation/methods), 4 (Part 12 brand firewall), and 5 (Part 2 wiki/HMTc firewall): all ✅ clean per subagent verdict with no findings to apply or push back on. No commercial brand attribution, no HMTc threshold proposals, no consumer-audience advisories, no invented analytical methods, speciation correctly handled (Cr-VI specific everywhere; arsenic and mercury non-speciated as source uses), all 8 metal and 8 product slugs in taxonomy, selenium/chromium-umbrella exclusions appropriate and documented. No false-positive findings to record. No content changes applied for Checks 2-5.

Page history

The five most recent substantive edits to this page. The full version history lives in git; when DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.