Appearance:White crystalline powder Content:98.0-101.0% Use: Good material modern skin care and hair care cosmetics Peculiarity:An amino acid composition of protein Packing:25kg/drum Min.Order Quantity:1kg Port:China main port Product specification: 1.Specific rotation(a)D20 (C=2,H20):-10.5°to -11.8° 2.Melting point (℃): 158℃ to 161℃ 3.Chloride (C1):Not more than 0.02% 4.Ammonium (NH4):Not more than 0.02% 5.Sulfate (SO4):Not more than 0.05% 6.Heavy metals (Pb):Not more than 10ppm 7.Iron(Fe):Not more than 20ppm 8.Arsenic (As2O3):Not more than1ppm 9.Loss on drying:Not more than 0.50% 10.Residue on ignition:Not more than 0.2%