Used as reducing agent, nylon brightener, phosphite raw material and pesticide intermediate.Determination of mercury, gold, silver and lead, reducing agent, determination of iodic acid, copper and cadmium. Phosphorous acid is the raw material of plastic stabilizer in industry. It is also used in the manufacture of synthetic fiber and phosphite.
Product Name
Phosphonic Acid
Multiple Names
Phosphonic Acid;
Phosphonic Acid;
Hydrogen Phosphonate;
Phosphorus(+3) Trihydride Cation Trihydroxide;
Orthophosphorus;
Orthophosphorous Acid;
Ortho-Phosphorous Acid
CAS No. 13598-36-2
EC No. 237-066-7
MF No. H3PO3
MW No. 81.9957
Assay Item | Standard |
Form | Crystals |
Color | White |
Boiling Point | 200°C |
Melting Point | 73°C |
Density | 1.651 g/mL at 25 °C(lit.) |
Colorless crystal. Soluble in water and alcohol.
Hydrogen chloride produced in the production process can be recycled to produce hydrochloric acid
Also used as antioxidant of nylon 1010
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