Category Pharmaceutical Raw Materials, Fine Chemicals, Bulk drugStandardMedical standardShelf life2 years Storage should be stored in a well-closed container at low temperature, keep away from moisture, heat and light.Test ItemStandard: USP Identification IR spectrum similar to that of RS HPLC retention time similar to that of RS Related substance Total impurities: NMT0.3% Single impurity: NMT0.1% Heavy metals NMT 10ppm Loss on drying NMT0.5% Residue on ignition NMT0.1% Assay:98.5%-101.0%