ABC00454PJ

Cysteinyl Cysteine

Cysteinyl Cysteine is a dimeric dipeptide formed by the oxidation of two cysteine residues, featuring an intramolecular disulfide bond between the thiol groups of adjacent cysteine units. Its structure comprises a peptide backbone with two thiolate groups and a central S–S linkage, conferring distinct redox properties compared to the parent monomeric amino acid. This impurity arises during cysteine-based API synthesis via non-enzymatic dimerization pathways. Serves as an HPLC reference standard for quantifying oxidative degradation byproducts in cysteine formulations.

On Request
Molecular Formula C6H12N2O3S2
Molecular Weight 224.3000
CAS Number 18048-87-8 ✓ Verified
PubChem CID 152238 ↗
Purity N/A
Product Type API Impurity
Parent Drug Cysteine
Lead Time On Request
IUPAC Name (2R)-2-[[(2R)-2-amino-3-sulfanylpropanoyl]amino]-3-sulfanylpropanoic acid

📝 Synonyms

Cys-cys CHEBI:131608 RefChem:1082811 Cysteinylcysteine L-cysteinyl-L-cysteine 18048-87-8 cysteinyl-cysteine (2R)-2-[[(2R)-2-amino-3-sulfanylpropanoyl]amino]-3-sulfanylpropanoic acid H-Cys-Cys-OH L-Cys-L-Cys

🔬 Chemical Identifiers

C([C@@H](C(=O)N[C@@H](CS)C(=O)O)N)S
InChI=1S/C6H12N2O3S2/c7-3(1-12)5(9)8-4(2-13)6(10)11/h3-4,12-13H,1-2,7H2,(H,8,9)(H,10,11)/t3-,4-/m0/s1
OABOXRPGTFRBFZ-IMJSIDKUSA-N

Related Products