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CAS 52-89-1

CAS 52-89-1 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 52-89-1
CAS 52-89-1PubChem CID 60960

Cysteine Hydrochloride

L-cysteine hydrochloride is a hydrochloride obtained by combining L-cysteine with one molar equivalent of hydrogen chloride. It has a role as a flour treatment agent, an EC 4.3.1.3 (histidine ammonia-lyase) inhibitor and a human metabolite. It contains a L-cysteinium. — ChEBI

IUPAC name
(2R)-2-amino-3-sulfanylpropanoic acid;hydrochloride
Molecular formula
C3H8ClNO2S
Molecular weight
157.62 g/mol
Exact mass
156.9964274 Da
Topological polar surface area
64.3 Ų
Hydrogen-bond donors
4
Hydrogen-bond acceptors
4
Covalent units
2
Defined stereocentres
1

Also known as

Cystein chlorideCysteine chlorhydratecysteine-hcl3-Mercaptoalanine hydrochlorideCysteine hydrochloride (anhydrous)CCRIS 3613Cysteine hydrochloride anhydrousNSC 8746
16 more reported names
EINECS 200-157-7WR 348UNII-A9U1687S1SEK 2367AI3-18781A9U1687S1SCysteine (as hydrochloride)CYSTEINE HYDROCHLORIDE, ANHYDROUSEC 200-157-7ELCYSNOURESSNSC-755898CYSTEINE HYDROCHLORIDE (II)CYSTEINE HYDROCHLORIDE ANHYDROUS (II)CYSTEINE HYDROCHLORIDE ANHYDROUS [II]CYSTEINE HYDROCHLORIDE (USP MONOGRAPH)
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External database identifiers

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

Records for CAS 52-89-1

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How CAS 52-89-1 is used on this site

CAS 52-89-1 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 52-89-1 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.