... slight particular odor, soluble in alcohol, glycerol.3. Specifications: Based on China Pharmacopeia 2005 edition,Part Two Sanction number: (2005)428401 (Approved ... ) ItemSpecificationAppearanceWhite loose powderpH2.5-3.5Benzene,%≤0.0002Loss on drying,%≤2.0Residue on ignition,%≤2.0Heavy metal,ppm≤20Viscosity15-30Assay for carboxylic ...