L-Cysteine Hcl Monohydrate
Standard AJI92
Structural formula: C3H8O2 NSCL.H2O
Speciific rotation [α] 20d: +5.5°-+7.0°
Tansmittance: not less than 98.0%
Ammonium: not more than 0.02%
Chloride (Cl): 19.89-20.29%
Sulfate (SO4): not more than 0.02%
Lron (Fe): not more than 10PPM
Heavy metals (Pb): not more than 10PPM
Arsenic (As2O3): not more than 1PPM
Other amino acid: Chromatographically not detectable
Residue on ignition: not more than 0.10%
Loss on drying: 8.5-12.0%
Assay: 99-101.5%
PH: 1.5-2.0