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CAS 3374-22-9

CAS 3374-22-9 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 3374-22-9
CAS 3374-22-9PubChem CID 594

DL-cysteine

Cysteine is a sulfur-containing amino acid that is propanoic acid with an amino group at position 2 and a sulfanyl group at position 3. It has a role as a fundamental metabolite. It is a polar amino acid, a sulfur-containing amino acid and an alpha-amino acid. It contains a sulfanylmethyl group. It is a conjugate base of a cysteinium. It is a conjugate acid of a cysteinate(1-). It is a tautomer of a cysteine zwitterion. — ChEBI

IUPAC name
2-amino-3-sulfanylpropanoic acid
Molecular formula
C3H7NO2S
Molecular weight
121.16 g/mol
Exact mass
121.01974964 Da
XLogP3
-2.5
Topological polar surface area
64.3 Ų
Hydrogen-bond donors
3
Hydrogen-bond acceptors
4
Covalent units
1
Defined stereocentres
0

Also known as

CYSTEINE, DL-5CM45Q5YAFNSC-63864RefChem:1083896222-160-2DL-Cystein(+/-)-2-Amino-3-mercaptopropionic acidNSC 63864
16 more reported names
ZysteinHcysd,l-cysteineUNII-5CM45Q5YAF[35s]cysteineCCRIS 85982-amino-3-sulfanyl-propanoic acidL-HSCH2CH(NH2)COOHCAS_5862DL-2-Amino-3-mercaptopropionic acidCS-W013566Tox21_111766_1H-Cys-OH HCl HOCAS-3374-22-9C3H7NO2SSR-01000944791
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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.

Records for CAS 3374-22-9

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How CAS 3374-22-9 is used on this site

CAS 3374-22-9 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 3374-22-9 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.