Formula: C₁₀H₁₃N₅O₅ CAS: 118-00-3 EC No.: 204-227-8 M (Molar Mass): 283.24 g/mol mp (Melting Point): 239°C (decomposes) Specific Rotation: [α]²⁰D -68° to -72° (c=2 in 0.1N NaOH) λmax: 253 nm (pH 7) Solubility: Slightly soluble in water; soluble in acids and bases

Assay (HPLC): ≥ 99.0% Appearance: White crystalline powder Identification (UV): A250/A260 = 0.95-1.05, A280/A260 = 0.63-0.71 Specific Rotation: [α]²⁰D = -70° ± 2° (c=2 in 0.1N NaOH) Loss on Drying: ≤ 0.5% Sulfated Ash: ≤ 0.1% Heavy Metals (as Pb): ≤ 20 ppm pH (saturated solution): 5.5-7.5 Related Nucleosides (HPLC): ≤ 0.5% Nitrogen Content: 24.5-25.5% Ribose Content: 37.5-39.5%