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EU cosmetic ingredients, restrictions and safety
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Official EU label nameGlossary entry 7974

CYSTEAMINE HCl

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.

0 markets with evidence
Markets checked
13
Markets with evidence
0
Evidence gaps
13
Resolved identifiers
2

Resolved substance identity

CAS:156-57-0
EC:205-858-1
Ingredient index records:
CYSTEAMINE HCL
Cosmetic functions: ANTIOXIDANT, HAIR WAVING OR STRAIGHTENING, REDUCING

Mercaptamine hydrochloride

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2 matched or reported names
CYSTEAMINE HCLcysteamine hydrochloride

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name CYSTEAMINE HCl.

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 156-57-0
CAS 156-57-0PubChem CID 9082

Cysteamine Hydrochloride

Cysteamine hydrochloride is an alkanethiol. — ChEBI

IUPAC name
2-aminoethanethiol;hydrochloride
Molecular formula
C2H8ClNS
Molecular weight
113.61 g/mol
Exact mass
113.0065981 Da
Topological polar surface area
27.0 Ų
Hydrogen-bond donors
3
Hydrogen-bond acceptors
2
Covalent units
2
Defined stereocentres
0

Also known as

2-Aminoethanethiol hydrochlorideCysteamine HClMercaptamine hydrochlorideCysteaminium chlorideBekaptanETHANETHIOL, 2-AMINO-, HYDROCHLORIDEMercaptoethylamine hydrochlorideMerkamin hydrochloride
16 more reported names
Mercamine hydrochlorideCysteamine chlorohydrateCysteaminhydrochloridCystaranIF1B771SVBNSC-758692CI-9148CYSTADROPSNSC-21116NSC-25116RefChem:54920Hydrochloride, Cysteamine205-858-12-Mercaptoethylamine hydrochlorideCysteamine (Hydrochloride)2-aminoethane-1-thiol hydrochloride
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External database identifiers

Retrieved from NIH PubChem on 2026-08-31 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 assessmentsFDA Global Substance Registration SystemILO/WHO International Chemical Safety CardsJapan NITE-CHRIPNIOSH Pocket Guide to Chemical HazardsOECD eChemPortalUS 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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