CAS Registry Number

CAS 638-23-3 — S)-Carboxymethyl-L-cysteine

(S)-Carboxymethyl-L-cysteine is a synthetic amino acid derivative widely used as a mucolytic agent to thin mucus, aiding respiratory conditions like chronic bronchitis and cystic fibrosis. It also functions as an antioxidant and is incorporated into pharmaceuticals, dietary supplements, and skincare formulations for its protective and hydrating properties. This chemical has a CAS number of 638-23-3, with the molecular formula C5H9NO4S and a molecular weight of 179.19. It carries no signal word under standard classification, requiring storage between 2 to 8°C for stability. Molekula supplies (S)-Carboxymethyl-L-cysteine from research to bulk quantities with full documentation and ISO 9001:2015 traceability.