CASR |
: | 7778-77-0 |
Molecular Formula |
: | KH2PO4 |
Molecular Weight |
: | 136.09 |
| Specifications | |
|---|---|
| Appearance: | White or almost white, odourless crystals, granular or crystalline or colourless powder. Is odorless and is stable in air. The pH of a solution (1 in 100) is about 4.5. |
| Solubility: | Freely soluble in water, practically insoluble in ethanol (96%) |
| Identification A (By Chemical test): | Solution should be faintly acid |
| Identification (Phosphate 1): | With silver nitrate solution neutral solution should yield yellow precipitate that soluble in 2N nitric acid and 6 N ammonium hydroxide. |
| Identification (Potassium 1): | White crystalline precipitate should form. |
| Identification (Potassium 2): | A yellow or orange-yellow precipitate should form immediately. |
| Identification (Phosphate 2): | With ammonium molybdate solution, acidified solutions should yield a yellow precipitate that should soluble in 6N ammonium hydroxide |
| Appearance of solution: | Clear and colorless solution |
| pH: | 4.2 to 4.5 |
| Reducing substances: | The color of the permanganate should not be completely discharged |
| Chlorides: | NMT 200 ppm |
| Sulfates: | NMT 300 ppm |
| Arsenic: | NMT 2 ppm |
| Iron: | NMT 10 ppm |
| Lead: | NMT 5 µg/gm |
| Fluoride(F): | NMT 10 µg/gm |
| Insoluble Substances: | NMT 20 mg (0.2%) |
| Loss on drying: | NMT 1.0% |
| Assay (on dried basis): | 98.0% to 100.5% |
| Sodium (Na): | NMT 0.1% |
| Total aerobic microbial count: | NMT 100 CFU/gm |
| Total combined yeast and mold count: | NMT 10 CFU/gm |
| E.coli: | should be absent/gm |
| Salmonella: | should be absent/10 gm |
| Staphylococcus aureus: | should be absent/gm |
| Bile-tolerant gram negative bacteria: | should be absent/gm |
| Bacterial endotoxins: | NMT 2.5 EU/mg |
