Formula: C₁₁H₁₃N₃O CAS: 83-07-8 EC No.: 201-452-3 M (Molar Mass): 203.24 g/mol mp (Melting Point): 109-111°C Appearance: Yellow crystalline powder

Assay (by titration): ≥ 99.0%. Appearance: Yellow crystalline powder. Melting Range: 109-111°C. 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 ≤ 0.5%. Antipyrine: ≤ 0.1%. Solubility: Soluble in water, ethanol. Color Reaction: With phenol and oxidant, forms red quinoneimine dye. pH (1% solution): 6.0-7.0.