Formula: C₅H₁₂O₅ IUPAC Name: Ribitol CAS: 488-81-3 EC No.: 207-687-8 M (Molar Mass): 152.15 g/mol mp (Melting Point): 102-104°C Specific Rotation: Optically inactive Appearance: White crystalline powder

Assay (HPLC): ≥ 99.0%. Appearance: White crystalline powder. Identification (IR): Passes test. Melting Range: 102-104°C. Specific Rotation: [α]²⁰D = 0° ± 0.5° (c=5 in water). 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 Polyols (HPLC): Total impurities ≤ 0.5%. Arabitol: ≤ 0.1%. Xylitol: ≤ 0.1%. Reducing Sugars: ≤ 0.1%. pH (10% solution): 5.0-7.0.