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Classification : Phosphorous Acid CAS No. : 13598-36-2 Other Names : PA; PPA;Phosphonic Acid; Hydrogen Phosphonate MF : H3PO3 EINECS No. : 237-066-7 Grade Standard : Industrial Grade Application : Industry Model Number : Inorganic Standard : HG/T2520-2006 Melting Point : 74℃ Boiling Point : 200℃ (Decomposes) Density : 1.651 Kg/L (21.1℃) Type: Feed Grade Minerals & Trace Elements Efficacy: Promote Nutrition