CAS Registry Number
CAS 56-89-3 — L-Cystine
L-Cystine is a disulfide-bonded dimer of the amino acid L-cysteine, used in biochemical research, cell culture media, and pharmaceutical formulations for its role in protein structure and antioxidant activity. It has a CAS number of 56-89-3, molecular formula [-SCH2CH(NH2)CO2H]2, and a molecular weight of 240.30 g/mol. Stable at ambient storage conditions. Molekula supplies L-Cystine from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Also known as: L-Cystine EP grade · L-Cystine - EDQM reference standard
Molekula products for CAS 56-89-3
L-Cystine
SKU 11394887
L-Cystine EP grade
SKU 90031737
L-Cystine - EDQM reference standard
SKU 90034759
Molekula has supplied fine chemicals and biochemicals since 2000 from ISO 9001:2015 and ISO 14001:2015 certified facilities. Every dispatched batch is logged with a batch number and matched to a Certificate of Analysis, and Safety Data Sheets are available in five languages.