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CAS 40454-21-5

CAS 40454-21-5 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 40454-21-5

CAS 40454-21-5PubChem CID 38477

N-(Aminoiminomethyl)-L-cysteine

IUPAC name: (2R)-2-(diaminomethylideneamino)-3-sulfanylpropanoic acid

Molecular formula: C4H9N3O2S
Molecular weight: 163.20 g/mol
Exact mass: 163.04154771 Da
XLogP3: -1.2
Topological polar surface area: 103.0 Å²
Hydrogen-bond donors: 4
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 1

Also known as

IQB-782n-guanylcysteineL-Cysteine, N-(aminoiminomethyl)-N-Guanidine-beta-mercaptoalanine48PVL851IDRefChem:926937N-Amidino-L-cysteineGUANYL-CYS-OH

16 more reported names

N-Guanyl-cysteineamidinocysteineN-AmidinocysteineIqb 782EINECS 254-925-1N-GUANYL-L-CYSTEINEBRN 2087654UNII-48PVL851IDCYSTEINE, N-AMIDINO-, L-CYSTEINE, N-AMIDINO-XWRZKLKALVJDDS-REOHCLBHSA-NN-(Diaminomethylidene)-L-cysteineDA-54366HY-1059402-GUANIDINO-3-MERCAPTOPROPIONIC ACIDCS-0026990

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External database identifiers

EPA DTXSID:DTXSID90193470

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 40454-21-5

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CAS 40454-21-5 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 40454-21-5 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.