Phosphoric Acid 70
CAS Number:13598-36-2
Formula﹕H₃PO₃
EINECS: 233-663-1
Physical state: white crystal
UN:2834 PACKING:25KG/BAG
PROSPHOROUS ACID
The production of H₃PO₃ involves specific physical steps to ensure purity and stability. Initially, phosphorus trichloride (PCl₃) is hydrolyzed by carefully adding it to water. This process requires careful control of the reaction temperature, as it is highly exothermic, releasing a significant amount of heat. Phosphorus trichloride reacts with water to produce phosphorous acid and hydrochloric acid as byproducts. The reaction mixture is then subjected to distillation under reduced pressure to separate it from the hydrochloric acid and any impurities. Finally, the concentrated it solution is cooled and crystallized to yield pure it's crystals, which are then dried and packaged for use in various applications. This process demands careful handling due to the highly reactive nature of the materials involved.
| 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 acts as an intermediate in synthesizing phosphite compounds, which are useful in producing pesticides, herbicides, and stabilizers for plastics. It's a key raw material in various industrial processes due to its high reactivity, facilitating the creation of compounds that are essential in agriculture and materials science.
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