Formula: C₅H₄N₄O₂ CAS: 69-89-6 EC No.: 200-718-6 M (Molar Mass): 152.11 g/mol mp (Melting Point): >300°C (decomposes) Appearance: White crystalline powder.

Assay (HPLC): ≥ 98.0 % Appearance: White powder. Identification (UV): λmax ~267 and ~238 nm in dilute NaOH. Solubility: Insoluble in water, soluble in alkali and acid. Loss on Drying: ≤ 0.5 % Residue on Ignition: ≤ 0.1 % Heavy Metals (as Pb): ≤ 10 ppm