CAS Registry Number: 90098-04-7 CAS Name: 2-[(4-Chlorobenzoyl)amino]-1,2-dihydro-2-oxo-4-quinolinepropanoic acid Molecular Formula: C19H15ClO4 N2 Standard : JPC2002 Molecular Weight: 370.79. Melting point: 288-294 癈 as hemihydrate Specification: Characteristics White crystalline powder Solubility Soluble,N,N-dimethylformamide Identification IR. Complies with the CRS HPLC. Complies with the CRS Chloride not more than 0.028% Heavy metal not more than10PPM Arsenic not more than2PPM Related substance(HPLC) Individual impurity: not more than0.1% Total impurity:not more than 0.5% Colorless and Transparent 5% DMF solution Loss on drying: not more than 3.0% Residue on ignition:not more than 0.1% Assay: not less than 99.0%