L-Cysteine Hydrochloride Hydrate
[CAS 345909-32-2]

Identification

• Classification: Biochemical >> Common amino acids and protein drugs
• Name: L-Cysteine Hydrochloride Hydrate
• Synonyms: (2R)-2-Azaniumyl-3-Sulfanyl-Propanoate; (2R)-2-Ammonio-3-Mercapto-Propionate; L-Cysteine Zwitterion
• Molecular Formula: C₃H₇NO₂S
• Molecular Weight: 121.15
• CAS Registry Number: 345909-32-2
• SMILES: [C@@H]([NH3+])(C([O-])=O)CS
• InChI: 1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)/t2-/m0/s1
• InChIKey: XUJNEKJLAYXESH-REOHCLBHSA-N

Properties

• Density: 1.3±0.1g/cm³ (Cal.)
• Melting point: 220°C (Expl.)
• Boiling point: 293.9±35.0°C at 760 mmHg (Cal.)
• Flash point: 131.5±25.9°C (Cal.)
• solubility: H2O: 25 mg/mL

Safety Data

• Safety Code: S36;S60
• Risk Code: R22
• Hazard Symbol: X
• Safety Description: WARNING: Not sold for human treatment, trials or use

References

• (1): Yong Tian, Ming-Li Chen, Xu-Wei Chen, Jian-Hua Wang, Yoshihiro Hirano, Hideyuki Sakamoto and Ikumei Setsu. Arsenic speciation with gradient hydride generation interfacing liquid chromatography and atomic absorption spectrometry, J. Anal. Atom. Spectrosc., 2010, 25, 48.