CAS NO.: 55297-96-6 Appearance: white or almost white crystal powderFormula: C28H47NO4HS.C4H4O4Molecular weight: 609.8Melting temperature: 143-149Specific rotation: +24°-+28°Identification: HPLC: The retention time obtained from the test solution corresponds to that Obtained from the standard solutionColor and clarity of solution: The solution obtained from with the method of current USP: clear and colorless, and the absorbance at 400nm and 650nm is not greater than 0.150 and 0.030. PH: 3.1-4.1 Content of fumarate: 83.7mg-87.3mg Residue on ignition: Not more than 0.1% Solvent residue: Content of Ethyl Acetate not more than 0.5% Chromatographic purity: Not more than 1.0% of any identified impurity is found, not more than 0.5% of any unidentified impurity is found, and not more than 2.0% of total impurities is found. Heavy metal: Not more than 0.001%Content: higher than 98% complied with USP31 Higher than 96.5% complied with EP6.0Loss on drying: not more than 0.5% Appliance Area: poultryRaw material: 25kg/drumStorage: keep in a well-container, protected from sealed light and stored in a dry place.Validity period: 5years