Specifications
l-cysteine hcl monohydrateCAS No 7048-04-6
EC No 200-157-7
l-cysteine hcl monohydrate
DETAILED DELIVERY SPECIFICATIONS
Specific rotation[]D20: 5.5 to 7.0
State of solution(transmittance): Clear and colorless 98.0% min.
Chloride[cl]: 19.89%~20.29%
Ammonium [NH4]: 0.02% max.
Sulfate[SO4]: 0.020% max.
Iron[Fe]: 10ppm max.
Heavy metals [Pb]: 10ppm max.
Arsenic[As2O3]: 1ppm max.
Other amino acids: Chromatographically not detectable
Loss on drying: 8.5%~12.0%
Residue on ignition[sulfated]: 0.10% max.
Assay: 99.0% min.
PH: 1.5 ~ 2.0