Phosphorous acid is an important chemical raw material and pesticide intermediate. There are many manufacturing companies in my country.

Phosphorous acid is an inorganic compound with the chemical formula H3PO3. It appears as a white crystalline powder and is easily soluble in water and ethanol. It can be oxidized to orthophosphoric acid in the air and hydrolyzed to phosphite in water. It is highly acidic and hygroscopic. Strong, strong reducibility, and good performance in…