Formula: C₅H₄N₄O₃ CAS: 69-93-2 EC No.: 200-720-7 M (Molar Mass): 168.11 g/mol Appearance: White crystalline powder.

Assay (Alkalimetric): ≥ 99.0 % Appearance: White powder. Identification (Murexide test): Passes test (red-purple color with HNO₃/NH₃). Solubility: Insoluble in water, soluble in alkali. Loss on Drying (over H₂SO₄): ≤ 0.5 % Residue on Ignition: ≤ 0.1 % Chloride (Cl): ≤ 0.02 % Sulfate (SO₄): ≤ 0.02 % Heavy Metals (as Pb): ≤ 10 ppm