Hypophosphoric acid: colorless oily liquid or crystalloid. Soluble in hot water, ethanol, ether. Dissolve in cold water.Decomposition by heat produces highly toxic phosphine gas. Burning immediately in case of H blowing agent. Can react strongly with oxidizing agents.
| ITEM | STANDARD | TEST RESULT |
| H3PO2 W/% ≥ | 50.0 | 50.58 |
| H3PO3 W/% ≤ | 0.5 | 0.079 |
| Na W/% ≤ | 0.50 | 0.02 |
| Fe W/% ≤ | 0.0020 | 0.00013 |
| Cl W/% ≤ | 0.015 | 0.0019 |
| Density (20 ℃) g/m3 | 1.210-1.226 | 1.212 |
| As | — | — |
| Pb | — | 0.1ppm |
| Cd | — | — |
| Conclusion: qualified | ||
1. Strong reducing agent, used for preparing hypophosphates such as sodium hypophosphate and calcium hypophosphate.
2. For electroplating bath. Pharmaceuticals. A reducing agent. General purpose reagent.
3. Strong reducing agents. Reduction of diazo salts (removal of diazo groups), reducing the elimination of halogens on the aromatic rings of polynitrocompounds.
4. Used as a reducing agent, for the production of hypophosphate, for the pharmaceutical industry, etc.