Disodium phosphate (DSP), or sodium hydrogen phosphate, is the inorganic compound with the formula Na2HPO4. It is one of several sodium phosphates. The salt is known in anhydrous form as well as forms with 2, 7, 8, and 12 hydrates. All are water-soluble white powders; the anhydrous salt being hygroscopic.
- Cas No:
- 10028-24-7
- Formula:
- Na2HPO4. 2H2O
- Molecular Weight:
- 177.99
- Character:
- White or almost white powder or colorless crystals, soluble in water , in soluble in alcohol(Ethanol)96%
- Packaging:
- 25/50 Kg. HDPE bags with polyliner inside.
- Storage:
- Preserve in tight container.
Available Grade & Specification
| Item | USP | BP | IP |
|---|---|---|---|
| Assay | NLT 98.0% & NMT 100.5% of Na2HPO4 on dried basis | 98.5 % to 102.5 | NLT 98.0% & NMT 100.5% of Na2HPO4 on anhydrous basis |
| Identification | Positive | Positive | Positive |
| Loss on drying | 55.0% to 64.0% | 57.0%-61.0% | 57.0%-61.0% |
| Insoluble substances | 0.4% max | ||
| Chloride | 0.06% Max | 400 PPM Max | |
| Sulphate | 0.2% Max | 0.1%max | |
| Arsenic | 16 PPM Max | 4PPM Max | 3PPM Max |
| Heavy Metals | 0.002% Max | 20 PPM Max | 4 PPM Max(as Pb) |
| Appearance of solution | Pass the test | ||
| Reducing substances | Pass the test | Pass the test | |
| Monosodium phosphate | 2.5% Max | ||
| Fluoride | 0.005% Max | ||
| Iron | 40 PPM Max |