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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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