CASR |
: | 7758-11-4 |
Molecular Formula |
: | K2HPO4 |
Molecular Weight |
: | 174.18 |
| Specifications | |
|---|---|
| Description: | White or almost white powder or colourless crystals, very hygroscopic |
| Solubility: | Very soluble in water, slightly soluble in alcohol. |
| Assay (acidimetric): | 98.0% - 100.5% |
| Identification (By Chemical test): | Solution S should slighty alkaline |
| Identification (Phosphate 1): | A yellow colour develops |
| Identification (Potassium 1): | A yellow or orange-yellow precipitate is formed immediately |
| Appearance of solution: | clear and colourless solution |
| Insoluble Substances: | NMT 0.2% |
| pH (5% aq soln): | 8.5 – 9.6 |
| Carbonate: | NMT a few bubbles are evolved |
| Chloride (Cl): | NMT 0.02% |
| Fluoride(F): | NMT 0.001% |
| Sulfate (SO4): | NMT 0.1% |
| Aluminium (Al): | NMT 0.0005% |
| Arsenic (As): | NMT 0.0002% |
| Iron (Fe): | NMT 0.001% |
| Sodium (Na): | NMT 1.5% |
| Potassium dihydrogen phosphate: | NMT 2.5% |
| Potassium dihydrogen phosphate and tri-potassium phosphate: | A blue color should produced, which should change to yellow (with a greenish tinge) by the addition of NMT 0.4ml of 1 N Hydrochloric acid. |
| Reducing substances: | The solution remains faintly pink |
| Loss on drying at 130°C: | NMT 1.0% |
| Total aerobic microbial count: | NMT 100CFU/gm |
| Total Yeast and mold count: | NMT 100CFU/gm |
| Bacterial endotoxins: | NMT 2.5IU/gm |
