WE COULD PROVIDE ALL NECESSARY DOCUMENT SUPPORT SUCH DMF,COS GMP ,ISO ECT AND PROVIDE EXCELLENT PIRCE AND BEST SERVICE FOR ALL THE CUSTOMER.WE HAVE SUPPLIED OUR PRODUCT TO ALL OVER THE WORLD. Tests Standards Characteristics: A white crystalline powder; odorless; slight bitterness. Solubility: To Conform Identification: To Conform Melting point: 168-172°C Loss on Drying: £0.5% Residue on Ignition: £0.1% Chloride: £0.014% Sulfate: £0.02% Heavy Metals: £0.001% P-Aminophenol: £0.005% Sulfide: To Conform Readily Carbonizable Substances To Conform Related Substances (4-chloroacetanilide): To Conform Organic Volatile Impurities To Conform Assay: 99.0-101.0%