L-Cysteine Hcl

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L-Cysteine Hcl

Product Name: L-Cysteine Hcl
Molecular Formula: C3H7NO2S·HCl·H2O 
Molecular Weight: 175.64 
CAS No: 7048-4-6

Product Specifications


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 /


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