Hypophosphorous acid Structural name: Hypophosphorous acid; Phosphinic acid
　　 Information: GB No. 81504
　　 CAS No. 6303-21-5
　　 Molecular formula: H₃PO₂
　　 Molecular weight: 65.99
　　 Appearance Colorless oily liquid or deliquescence crystal, product is 50% aqueous solution; Vapor pressure: <2.27kPa(20^οC);
　　 Melting point 26.5^οC
　　 Boiling point 107.8^οC;
　　 Solubility Miscible with water; Relative density (water=1) 1.49;
　　 Stability Stable; Hazard lable: 20 (acidic corrosive);
　　 Main use Used as reducing agent and in pharmaceutical industry