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        Welcome to Suzhou Hantech Chemical Co.,Ltd!  
        Phosphorous acid

        Phosphorous acid executive standard: HG/T2520-93

        Item

        Index (%)

         

        Top grade(solid)

        Top grade(liquid)

        main content (in H3PO3)

        ≥98.0

        ≥80.0

        chloride (in CL)

        ≤0.01

        ≤0.03

        iron (in Fe)

        ≤0.001

        ≤0.003

        phosphate (in PO4)

        ≤0.2

        ≤0.6

        sulfate (in SO4)

        ≤0.008

        ≤0.01

        Molecular formula: H3PO3
        Molecular weight: 81.99
        English name: Phosphorous acid
        Appearance: white crystal
        Property: It is corrosive. And harmful product of combustion is phosphorane and phosphorus oxide; harmful on skin and environment; having pollution on water
        Uses: Raw material in manufacturing of phosphate and plastic stabilizer; as reducing agent in chemical reaction; applied in synthetic fiber and pesticide industry
        Packing and storage: Inner packing adopts double layer vinyon film bag; outer packing adopts full open iron drum or fiberboard drum in seal



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