L - triptofan

Product name: L-Tryptophan Description It occurs as white to yellow-white crystals or crystalline powder. One gram dissolves in about 100 mL of water. It is soluble in hot alcohol, in dilute hydrochloric acid, and in alkali hydroxide solutions. Applications It is mainly used for amino acid infusion, comprehensive amino acid preparation, food nutrition enhancer. Specification Appearance White or almost white, crystalline or amorphous powder Appearance of solution Clear and not more intensely coloured than reference solution BY6 Specific optical rotation -30.0°- -33.0° Ninhydrin-positive substances Any impurity ≤0.5% Other related substances 1,1′-ethylidenebistryptophan≤10ppm Chloride ≤0.02% Sulfate ≤0.03% Ammonium ≤0.02% Iron ≤10ppm Heavy metals ≤10ppm Lead ≤5ppm Loss on drying ≤0.5% Residue on ignition ≤0.1% Assay 98.5-101.0% Packing 25kg/ drum or as per requirement. Storage Store in a cool dry place, protected from light.