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  • L-Cysteine-HCL Monohydrate/Anhydrous

L-Cysteine-HCL Monohydrate/Anhydrous

Description:

【CAS】: 52-89-1 (L-cysteine-hydrochloride, anhydrous)

【CAS】: 7048-04-6 (L-cysteine-hydrochloride, monohydrate)

【Molecular formula】: C3H7O2NS.HCL.H2O

【Relative molecular mass]: 175.64

【Properties】: Colorless to white fine columnar crystals or white crystalline powder, with slight special smell and sour taste, melting point 175℃ (decomposition). Soluble in water, the aqueous solution is acidic, PH value is 1.2 at 3%, 1.7 at 1%, 2.4 at 0.1%. Also soluble in ethanol, ammonia and acetic acid, insoluble in ether, acetone, benzene, carbon disulfide and chloroform.

【Packaging and Storage】Store in a cool place, avoid direct sunlight and humid environment.

L-Cysteine Hcl Monohydrate L-Cysteine Hcl Anhydrous  
AJI92 USP36 CP2015 ( Injection Grade ) AJI92  
Assay 99.0-100.5% 98.5-101.5% ≥98.5% 98.0-10.2.0%
PH 1.5-2.0 / 1.5-2.0 1.5-2.0
Specific rotation[a]D20 +5.5°-+7.0° +5.7°-+6.8° +5.5°-+7.0° +5.6°-+8.9°
Specific rotation[a]D25 / / / /
Transmittance(T430) ≥98.0% / ≥98.0% ≥98.0%
Chloride(Cl) 19.89-20.29% / 19.8-20.8% /
Ammonium(NH4) ≤0.02% / ≤0.02% /
Sulfate(SO4) ≤0.02% ≤0.03% / /
Iron(Fe) ≤10PPM ≤30PPM ≤10PPM /
Heavy metals(Pb) ≤10PPM ≤15PPM ≤10PPM ≤10PPM
Arsenic ≤1PPM / ≤1PPM ≤1PPM
Other amino acids conform individual impurities≤0.5% total impurities≤2.0% ≤0.5% conform
Ninhydrin-positive substances / / / /
Loss on drying 8.5-12.0% 8.0-12.0% 8.5-12.0% ≤1.0%
Residue on ignition ≤0.10% ≤0.4% ≤0.10% ≤0.1%
Organic volatile impurities / / / /
Endotoxin / / conform /