Phosphorous Acid 70
CAS Number:13598-36-2
Formula﹕H₃PO₃
EINECS: 233-663-1
Physical state: white crystal
UN:2834 PACKING:25KG/BAG
Xiamen Ditai Chemicals Co., Ltd. is one of the most reliable manufacturers and suppliers of phosphorous acid 70 in China. Welcome to buy high quality chemical products at competitive price from our factory.
PROSPHOROUS ACID
Phosphorous acid (H₃PO₃) is a diprotic acid, meaning it can donate two protons (H⁺) in aqueous solution. It exhibits reducing properties, making it useful in redox reactions. One of its key chemical characteristics is the presence of a P-H bond, which differentiates it from phosphoric acid (H₃PO₄). When heated, phosphorous acid decomposes to form phosphine (PH₃) and phosphoric acid. It reacts with bases to form phosphite salts. Phosphorous acid also acts as a precursor in the preparation of certain organophosphorus compounds. Its oxidation state of phosphorus is +3.
| Test items | Stand |
|
Assay (based on H3PO3) ≥% |
98.5%Min |
|
Sulfate(based on SO4) ≤% |
0.006%Max |
|
Chloride(based on CL) ≤% |
0.01%Max |
|
Phosphate(based on PO4) ≤% |
0.1%Max |
|
Heavy Metal(Pb) ≤% |
0.001%Max |
Phosphorous acid is sometimes used as a precursor for phosphite fertilizers, which are slowly absorbed and utilized by plants. Unlike phosphate fertilizers, phosphites can be absorbed through leaves, making them valuable for foliar feeding. They provide a slow-release source of phosphorus that helps promote root growth, strengthen cell walls, and increase resistance to pathogens. Due to its low toxicity, it can be applied safely to a wide range of crops without affecting the soil's natural microbial balance.
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