L-Cysteine Base

L-Cysteine Base CAS NO 52-90-4Chemical Name L-Cysteine BaseMolecular StructureMolecular FormulaC3H7NO2SMolecular Weight121.15CharacteristicsWhite crystalline powder,tasteless,easily soluble in water but insoluble in alcohol and etherPacking25kg/drum,25kg/cartonQualified StandardAJI92/USP28/EP5/FCCIVSpecification Specific rotation[a]D20° +8.3° +9.5°State of solution≥95.0%Heavy metals(Pb) ≤10PPmResidue on ignition ≤0.1%Iron(Fe)≤10PPmLoss on drying ≤0.5%Other amino acids ConformsArsenic(As2O3) ≤1PPmChloride(CI) ≤0.04%Ammonium(NH4)≤0.02%Sulfate(SO4) ≤0.03%Assay 98.0 101.0%PH4.5 5.5