Property: The pure form of this product is a colorless crystal with the density of (19°C)1.493 and the melting point of 26.5°C. It can be mixed with water in any proportions. Being a strong reducer, it can be mixed with water in any proportion, and it is easily oxidized in air. If the anhydrous acid is heated to 130-140°C, it will be decomposed into PH3 and H3PO4.
Uses:
1.As antioxidant and color-reducing agent for alkyd resin.
2.As reducer.
3.In the manufacture of sodium hypophosphite, calcium hypophosphite, manganese hypophosphite, iron hypophosphite etc.
Specification:
Item Specification
Hypophosphorous acid (H3PO2) Content, % ≥ 50.0
Phosphorous acid (H3PO3) Content, % ≤ 0.3
Iron (Fe) Content, % ≤ 0.0005
Chloride (Calculated as Cl)Content, % ≤ 0.015
Sodium(Na)Content, % ≤ 0.05
Sulfate(Calculated as SO4 )Content, % ≤ 0.015
Arsenic (As)Content, % ≤ 0.0001
Lead (Pb)Content, % ≤ 0.0005
Chroma(Hazen) 30
Relative Density(20°C) 1.210-1.226
