Official EU label nameGlossary entry 22779

POTASSIUM THIOGLYCOLATE

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

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Resolved identifiers

Resolved substance identity

CAS:34452-51-2

EC:252-038-4

Ingredient index records:

POTASSIUM THIOGLYCOLATE

Cosmetic functions: DEPILATORY, HAIR WAVING OR STRAIGHTENING

Potassium mercaptoacetate

Inventory restriction note: III/2a

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1 matched or reported name

POTASSIUM THIOGLYCOLATE

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name POTASSIUM THIOGLYCOLATE.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 34452-51-2

CAS 34452-51-2PubChem CID 23688957

Potassium Thioglycolate

Based on the available data, the CIR Expert Panel concluded that ... Potassium Thioglycolate is safe for use in hair straighteners, permanent waves, tonics, dressings, and so forth, wave sets, other non-coloring hair products, and hair dyes and colors, as described in this safety assessment, at concentrations up to 15.2% (as Thioglycolic Acid). Hairdressers should avoid skin contact and minimize consumer skin exposure. Potassium Thioglycolate in depilatories is safe when formulated to be non-irritating under conditions of recommended use. — Cosmetic Ingredient Review (CIR)

IUPAC name: potassium 2-sulfanylacetate

Molecular formula: C2H3KO2S
Molecular weight: 130.21 g/mol
Exact mass: 129.94908199 Da
Topological polar surface area: 41.1 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 3
Covalent units: 2
Defined stereocentres: 0

Also known as

Potassium 2-mercaptoacetateAcetic acid, mercapto-, monopotassium saltUNII-XP5WZO5W6HXP5WZO5W6HEINECS 252-038-4Acetic acid, 2-mercapto-, potassium salt (1:1)EC 252-038-4Mercaptoacetic acid, monopotassium salt

12 more reported names

RefChem:175626POTASSIUM THIOGLYCOLATE [INCI]252-038-4potassium;2-sulfanylacetatePotassium mercaptoacetatepotassium sulfanylacetatepotassium,2-sulfanylacetatePotassium2-mercaptoacetateC2H3KO2SHYTYHTSMCRDHIM-UHFFFAOYSA-MDB-371697Mercaptoacetic acid potassium, 40 to 44% aqueous solution

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External database identifiers

EPA DTXSID:DTXSID30885589

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal US EPA CompTox CTX APIs

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Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

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