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

Chemical Name	S-Carboxymethyl-L-Cysteine
Molecular Structure
Molecular Formula	C5H9NO4S
Molecular Weight	179.19
Characteristics	White  crystals or crystalline powder,strongly acid taste
Packing	25㎏/drum，25㎏/carton
Quality  Standard	AJI92/USP28/EP5/FCCIV
Specification
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