Formula: C₄H₆N₄O₃ CAS: 97-59-6 EC No.: 202-592-8 M (Molar Mass): 158.12 g/mol mp (Melting Point): 238-240°C (decomposes) Appearance: White crystalline powder

Assay (HPLC): ≥ 98.5%. Appearance: White crystalline powder, odorless. Identification (IR): Passes test. Melting Range: 238-240°C (with decomposition). Loss on Drying: ≤ 0.5% (at 105°C for 2 hours). Residue on Ignition: ≤ 0.1%. Heavy Metals (as Pb): ≤ 10 ppm. Chloride (Cl): ≤ 0.02%. Sulfate (SO₄): ≤ 0.02%. Related Substances (HPLC): Total impurities ≤ 1.0%. Uric Acid: ≤ 0.1%. pH (saturated solution): 5.0-7.0. Solubility: Slightly soluble in water, soluble in alkali.