S-Carboxymethyl-L-Cysteine CAS NO 638-23-3

S-Carboxymethyl-L-Cysteine CAS NO638-23-3 Chemical Name S-Carboxymethyl-L-Cysteine Molecular StructureMolecular FormulaC5H9NO4S Molecular Weight179.19CharacteristicsWhite crystals or crystalline powder,strongly acid tastePacking25KGS/drum,25KGS/cartonQuality StandardAJI92/USP28/EP5/FCCIVSpecification Specific rotation[a]D20° -33.5° -36.5° State of solution Clear and colorless (Tranamittance) ≥98.0% Chloride(Cl) ≤0.039% Ammonium(NH4) ≤0.02% Sulfate(SO4) ≤0.020% Iron(Fe) ≤30PPm Heavy metals(Pb) ≤10PPm Arsenic(As2O3) ≤1PPm Other amino acids Chromatographically not detectable Loss on drying ≤0.30% Residue on ignition (Sulfated) ≤0.10% Assay 98.5 101.0% PH 2.0 3.5