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GS-51: Green Seal Standard for Laundry Care Products for Industrial and Institutional Use, Edition 1.6

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Overview

Green Seal GS-51 Edition 1.6 is a voluntary environmental certification standard for industrial and institutional laundry care products. It is not an occurrence study and reports no measured product concentrations, but it gives routeable regulatory context for laundry detergents, laundry additives, fabric softeners, prewash/stain-removal products, anti-static products, fabric refreshers, anti-wrinkle products, starch/sizing/fabric-finish products, and fabric protectants. Its heavy-metal relevance is limited to binary intentional-addition prohibitions in formulated products and a 100 ppm sum ceiling for four metals in packaging.

Key numbers

  • Edition and version: Edition 1.6 was issued April 8, 2020; it replaced Edition 1.5 from September 12, 2019. The cover is copyright 2021, and the foreword says corrections or clarifications to this edition were last made on July 30, 2021.
  • Scope: GS-51 covers products used to clean, remove stains, or otherwise treat softness, static, or wrinkle characteristics of laundry. The named product groups include laundry detergent products; pre-treatment stain and spot removing products; softening products; laundry additives including bleaching, softening, sour, antichlor, and alkali booster products; anti-static products; fabric refresher products; anti-wrinkle products; laundry prewash products; laundry starch/sizing/fabric finish products; and fabric protectant products.
  • Scope exclusions: the standard addresses the products, not the laundry facility, equipment, equipment maintenance, dry-cleaning solvent, ozone process, carpet or upholstery maintenance, or footwear/leather care products. Products containing enzymes or microorganisms sold in spray packaging are excluded.
  • Product prohibited components: the undiluted product shall not contain the heavy metals lead, hexavalent chromium, or selenium, either in elemental form or compounds.
  • Colorants: each colorant must be FDA-certified for ingestion, be a natural component, or not have the following heavy metals intentionally added: arsenic, cadmium, cobalt, hexavalent chromium, lead, manganese, mercury, nickel, and selenium.
  • Packaging heavy-metal restriction: lead, mercury, cadmium, and hexavalent chromium shall not be intentionally introduced into packaging. The sum of the concentration levels of those metals present in the packaging shall not exceed 100 ppm, with an exception for primary packages that would not exceed the maximum level but for the addition of post-consumer materials.
  • Packaging definition: “intentionally introduced” does not include processing aids or intermediates that impart chemical or physical changes during manufacturing, as long as the substance or intermediate is present in the primary package at concentrations below 100 ppm.
  • VOC limits for categories not regulated by CARB: laundry detergent products as part of a multi-component system 4%; laundry detergent products as a complete detergent 12%; bleaching products not sold as laundry detergent products 8%; softening products 4%.
  • Acute toxicity thresholds used by the standard: the undiluted product is considered toxic if oral LD50 < 5,000 mg/kg, inhalation LC50 < 20,000 ppmV at 1 hour, or dermal LD50 < 2,000 mg/kg.
  • Skin absorption screen: the undiluted product shall not contain components present at 1% or more that carry ACGIH skin notation or DFG MAK skin-absorption H notation; components present at 0.01% or more that sum to 1% with the same target organ are also covered.
  • Eutrophication: the product as used shall not contain phosphorus at more than 0.5% by weight.
  • Concentration and compaction: concentrated and ultra-concentrated dose ceilings are 5.2 ml/kg and 2.6 ml/kg for liquid laundry detergent products, 9.4 g/kg and 5.0 g/kg for solid/powder laundry detergent products, and 5.2 ml/kg and 2.6 ml/kg for softening products not sold as laundry detergent products.

Methods (brief)

This is a programme standard, not an analytical paper. It sets scope, performance, sustainability, manufacturing, packaging, user-information, label, and trademark requirements for Green Seal certification. It does not report product sampling, analytical chemistry, LOD/LOQ values, laboratory instruments, or measured concentration distributions.

Speciation: the standard names hexavalent chromium explicitly, so this page routes chromium as Cr-VI. The standard names arsenic and mercury without speciation; this page records them as tAs and tHg context and does not infer inorganic arsenic or methylmercury. Selenium is named in the standard, but no current HMI metal page slug exists for selenium, so selenium is documented in Key numbers and omitted from wiki-page links.

Update history

The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git.

CommitDateChangeDescription
b01ec52c312026-08-04major1 section added
3171d069e32026-08-02major1 section added
90a2f9a38e2026-07-30major1 section added and 1 removed; narrative text revised
eaa8eeeedf2026-07-27major1 section added
50de6ab2172026-07-27minorNarrative text revised

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