Formula: C₅H₅N₅O·HCl CAS: 635-39-2 EC No.: 211-236-9 M (Molar Mass): 187.59 g/mol mp (Melting Point): >300°C (decomposes) Solubility: Slightly soluble in water; soluble in dilute acids

Assay (HPLC): ≥ 99.0% Appearance: White to off-white crystalline powder Identification (Cl⁻): Passes test Loss on Drying: ≤ 0.5% Sulfated Ash: ≤ 0.1% Heavy Metals (as Pb): ≤ 20 ppm pH (saturated solution): 2.5-4.0 Chloride Content: 18.5-19.5% Guanine Content: 79.0-81.0% Related Purines (HPLC): ≤ 0.5% Nitrogen Content: 36.5-37.5%