Detailed Tech Specifications: Appearances: White crystalline powder Assay: 98.0-102.0% Specific rotation: +84-87.5 Loss on drying: 2.0% Max. PH of 10% aqucous solution: 5-8 Heavy metals (Pb): 10ppm Max. Arsenic: 1ppm Max. Sulphated ash: 0.7ppm Max. Hydrolysis products: 1.5ppm Max. Two sugar chloride: 0.5% Max. Single sugar chloride: 0.1% Max. Triphenyl phosphine oxide: 160ppm Max. Methanol: 0.1% Max. Total plate count: 1000/g Max. Mold: 100/g Max. Coliforms: Negative Also, please feel free to contact us if you have demands on other pharmaceuticals and chemicals. Waiting for your early reply.