D-Aspartic acid is white crystal or crystal powder, have slight acid taste. Slight soluble in water, but Insoluble in ethanol or ether. It is not natural amino acid, it can be used for raw material of medicine and medicine intermediate. Item StandardAssay98.5101.0transmittance≥98.0specific roation-24.8°-25.8°pH2.53.5loss in drying≤0.20residue on ignition≤0.10Chloride[Cl]≤0.02Sulfate[SO42-]≤0.02Arsenic[As]≤1 ppmHeavy Metals[Pb]≤10 ppmIron[Fe]≤10 ppmAmmonium salt[NH4]≤0.02%Other Amino Acidsconforms