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    Phosphorous acid

    Phosphorous acid executive standard: HG/T2520-93


    Index (%)


    Top grade(solid)

    Top grade(liquid)

    main content (in H3PO3)



    chloride (in CL)



    iron (in Fe)



    phosphate (in PO4)



    sulfate (in SO4)



    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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