Are you looking for L-Serine? Please contact TNJ Chemical China, will offer you best product with competitive price you demand,please contact :sales@tnjchem.com Specification: Appearance White crystalline powder Specific optical rotation, [a]D200 +14.0o~+15.50o Loss on Drying, % ≤0.20 Heavy metals, % ≤0.015 Chloride, % ≤0.02 Iron (Fe), % ≤0.02 Sulfate (SO4), % ≤0.02 Residue on Ignition, % ≤0.10 Chromatographic purity, % Single impurity ≤0.50 Total impurity ≤2.00 Assay, % 98.50~101.00 Application: 1, Biochemical reagents and food additives. 2, Nutritional supplements, as a nutritional supplement in cosmetics. 3 Can be used for biochemical and nutritional research, but also can be used as raw materials for synthesis of serine. Packing: 25kg/fiber drum