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CAS 19771-63-2

CAS 19771-63-2 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 19771-63-2
CAS 19771-63-2PubChem CID 72390

Procysteine

(4R)-2-oxo-4-thiazolidinecarboxylic acid is an organonitrogen compound and an organooxygen compound. It is functionally related to an alpha-amino acid. — ChEBI

IUPAC name
(4R)-2-oxo-1,3-thiazolidine-4-carboxylic acid
Molecular formula
C4H5NO3S
Molecular weight
147.15 g/mol
Exact mass
146.99901420 Da
XLogP3
-0.1
Topological polar surface area
91.7 Ų
Hydrogen-bond donors
2
Hydrogen-bond acceptors
4
Covalent units
1
Defined stereocentres
1

Also known as

(R)-2-Oxothiazolidine-4-carboxylic acidoxothiazolidinecarboxylic acidKoprosteineL-2-Oxothiazolidine-4-carboxylic acid4-Thiazolidinecarboxylic acid, 2-oxo-, (4R)-L-2-Oxo-4-thiazolidinecarboxylic acid4-Thiazolidinecarboxylic acid, 2-oxo-, L-(-)-2-Oxo-4-thiazolidinecarboxylic acid
16 more reported names
X7063P804E2-oxo-l-thiazolidine-4-carboxylic acid2-OXO-4-THIAZOLIDINECARBOXYLIC ACID, L-2-oxo-4-thiazolidine carboxylic acidRefChem:930008L-2-OTZD-4-CXA2-Oxothiazolidine-4-carboxylic acid4-Thiazolidinecarboxylic acid, 2-oxo-(R)-(-)-2-Oxothiazolidine-4-carboxylic acid(4R)-2-oxothiazolidine-4-carboxylic acid(R)-2-Oxo-4-thiazolidinecarboxylic acidL-2-Oxothiazolidine-4-carboxylateL-2-Thiazolidinone-4-carboxylic Acid4-Thiazolidinecarboxylic acid, 2-oxo-, (R)-C4H5NO3SHMS2051K09
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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 19771-63-2

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How CAS 19771-63-2 is used on this site

CAS 19771-63-2 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 19771-63-2 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.