phosphorous acid large stock

phosphorous acid large stock Molecular Formula: H3PO3 Molecular Weight: 82.00 Since 1985 Large stock

Phosphorous acid is a colorless crystal. It can be slowly oxidized to phosphoric acid in the air. When heated to 180 °C, it can be decomposed into phosphoric acid and phosphine (highly toxic). As a dibasic acid, it has slightly be acidity than phosphoric acid. Phosphorous acid has b reducibility and can easily reduce Ag+ to metal silver. It can also reduce sulfuric acid to sulfur dioxide. It is corrosive and has hygroscopicity.

Relative Density: 1.651 (21.1 °C)

Melting Point: 73.6 °C

Boiling Point: 200 °C (Decomposes)

Solubility: Easily soluble in water and alcohol.

Specification	A Grade	B Grade
Main Content(based on H3PO3 ) (%)	≥ 99.0	≥ 98.5
Iron Content(based on Fe) (%)	≤ 0.001	≤ 0.003
Chloride Content(based on CL) (%)	≤ 0.01	≤ 0.02
Sulfate Content(based on SO4) (%)	≤ 0.008	≤ 0.01
Phosphate Content(based on PO4) (%)	≤ 0.2	≤ 0.6
Appearance	Pure white crystal	White crystal
70% Aqueous Solution Test	Colorless transparent	Colorless transparent, without impurities
Liquid Phosphorous Acid (%)	≥ 70-80	Colorless, transparent

  

The application of phosphorous acid:

 used in water treatment, as a food additive and in the production of fertilizers, make up Chemical fertilizers, detergents, food and feed additives, flame retardants and various phosphates.