Cysteine

CAS 52-90-4 2 FDA-DMF suppliersSmall Molecule

Overview

Cysteine is a small molecule active pharmaceutical ingredient (ChEMBL CHEMBL863).

API suppliers (4)

Suppliers of Cysteine backed by a verifiable FDA Type II Drug Master File. Source: FDA quarterly DMF list.

  • NIPPON PROTEIN CO INC1 active DMF
  • NIPPON PROTEIN CO INC1 active DMF
  • NIPPON PROTEIN CO INC1 active DMF
  • SIGMA F AND D DIV LTD

Patent & exclusivity (US)

Per the FDA Orange Book (1 approved US product), the latest listed US patent on Cysteine expires 15 Jan 2039. Generic API sourcing typically opens up once these lapse.

Chemical identity

IUPAC name
(2R)-2-amino-3-sulfanylpropanoic acid
Canonical SMILES
C([C@@H](C(=O)O)N)S
InChIKey
XUJNEKJLAYXESH-REOHCLBHSA-N

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