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          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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