Phosphorous acid executive standard: HG/T2520-93
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Item
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Index (%)
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Top grade(solid)
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Top grade(liquid)
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main content (in H3PO3)
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≥98.0
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≥80.0
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chloride (in CL)
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≤0.01
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≤0.03
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iron (in Fe)
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≤0.001
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≤0.003
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phosphate (in PO4)
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≤0.2
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≤0.6
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sulfate (in SO4)
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≤0.008
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≤0.01
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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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