Catalog No. Size PriceQuantity
M12787-2 2mg solid $80
M12787-10 10mg solid $240


L-Cystine is an amino acid and intracellular thiol, which plays a critical role in the regulation of cellular processes.

Product information

CAS Number: 56-89-3

Molecular Weight: 240.30

Formula: C6H12N2O4S2

Chemical Name: (2R)-2-amino-3-{[(2R)-2-amino-2-carboxyethyl]disulfanyl}propanoic acid

Smiles: N[C@@H](CSSC[C@H](N)C(O)=O)C(O)=O


InChi: InChI=1S/C6H12N2O4S2/c7-3(5(9)10)1-13-14-2-4(8)6(11)12/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12)/t3-,4-/m0/s1

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: 0.1 M NaOH : 5 mg/mL (20.81 mM; ultrasonic and adjust pH to 9 with NaOH) 0.1 M HCL : 2.5 mg/mL (10.40 mM; ultrasonic and adjust pH to 2 with HCl) DMSO : < 1 mg/mL (insoluble or slightly soluble) H2O : < 0.1 mg/mL (insoluble)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥360 days if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200


  1. Ohtsu I, et al. Uptake of L-cystine via an ABC transporter contributes defense of oxidative stress in the L-cystine export-dependent manner in Escherichia coli. PLoS One. 2015 Apr 2;10(3):e0120619.

Products are for research use only. Not for human use.

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