Phosphorous acid, molecular formula H3PO3, colorless crystal, is one of the oxyacids of phosphorus and is a weak binary acid. Phosphorous acid has reducibility and can easily reduce Ag+ to metal silver. It can also reduce sulfuric acid to sulfur dioxide. It is corrosive and has hygroscopicity.
- Molecular Formula:H3O3P
- Molecular Weight:82
- Stability: Stable. Incompatible with strong bases. Hygroscopic.
Phosphorous acid Specification：
|Item||A Grade||B Grade||C Grade|
|Main Content(based on H3PO3 ) (%)||≥ 99.0||≥ 98.5||≥ 97.0|
|Chloride Content(based on CL) (%)||≤ 0.001||≤ 0.01||≤ 0.02|
|Iron Content(based on Fe) (%)||≤ 0.0005||≤ 0.001||≤ 0.005|
|Phosphate Content(based on PO4) (%)||≤ 0.1||≤ 0.2||≤ 0.6|
|Sulfate Content(based on SO4) (%)||≤ 0.0005||≤ 0.008||≤ 0.01|
|Appearance||Pure white crystal||White crystal||White crystal|
Phosphorous acid Application:
1. It is the raw material for manufacturing phosphite, and also the raw material for manufacturing plastic stabilizers (such as dibasic lead phosphite) and organophosphorus pesticides. Used as a stabilizer for polycarbonate. Also used as an antioxidant for nylon 1010.
2. Used as a chemical reagent
3. Water treatment
Phosphorous acid Packaging Details
25kg/500kg/1000kg in woven bag lined with double layer polythene bag
Flammability hazard characteristics:
In case of H, the pore-forming agent is flammable; when heated, it decomposes toxic phosphorus oxide fumes
Storage and transportation characteristics:
The warehouse is ventilated, low-temperature and dry; store it separately from H pore-forming agent and alkali.
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