Formula: C₉H₁₃N₃O₅ CAS: 65-46-3 EC No.: 200-610-9 M (Molar Mass): 243.22 g/mol mp (Melting Point): 210-220°C (decomposes) Specific Rotation: [α]²⁰D +31° to +35° (c=1 in water) λmax: 271 nm (in water, pH 7) Solubility: Soluble in water; slightly soluble in ethanol

Assay (HPLC): ≥ 99.0% Appearance: White crystalline powder Identification (UV): λmax 271 nm, A250/A260 = 0.45-0.52, A280/A260 = 2.00-2.20 Specific Rotation: [α]²⁰D = +33° ± 2° (c=1 in water) Loss on Drying: ≤ 0.5% Sulfated Ash: ≤ 0.1% Heavy Metals (as Pb): ≤ 20 ppm pH (1% solution): 6.0-7.5 Purity (HPLC): ≥ 99.0% Related Nucleosides (HPLC): ≤ 0.5%