Items Standard Identification The IR Absorption spectrum is concordant with the spectrum of reference standard. Test A (IR) Ratio:A245/A262,between 0.63 and 0.67 Test B (UV) 0.63-0.67 Assay(By HPLC) Not less than 98.5% W/W and not more than 101.5%W/W of C6H6N2O, calculated on the dried basis. Characteristics White crystalline powder Melting range 128-131 Loss on drying 0.5% Residue on ignition 0.1% Heavy metals 0.003%
