Category:
Active Pharmaceutical Ingredients
CAS NO:
56-89-3
Standard:
EP,
Acetylcysteine Impurity A, chemically identified as L-Cystine, is a critical oxidation byproduct formed during the synthesis of Acetylcysteine. Its molecular formula is C6H12N2O4S2 with CAS No. 56-89-3. This dimeric structure arises from the coupling of two cysteine units and serves as a primary reference standard for purity assessment in pharmaceutical manufacturing.