| CAS No.: | 7778-77-0 |
|---|---|
| Formula: | Kh2po4 |
| EINECS: | 231-913-4 |
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| Name of index | FCC-V | E340(i) | USP-30 | |
| Description | Odourless, colourless crystals or white granular or crystalline powder | |||
| Solubility | -- | Freely soluble in water. Insoluble in ethanol | -- | |
| Identification | Pass test | Pass test | Pass test | |
| pH of a 1 % solution | -- | 4.2-4.8 | -- | |
| Content(as dry base) | % | ≥98.0 | 98.0 (105ºC,4h) | 98.0-100.5 (105ºC,4h) |
| P2O5 Content(Anhydrous basis) | % | -- | 51.0 -53.0 | -- |
| Water insoluble(Anhydrous basis) | ≤% | 0.2 | 0.2 | 0.2 |
| Organic volatile impurities | -- | -- | Pass test | |
| Fluoride | ≤ppm | 10 | 10(expressed as fluorine) | 10 |
| Loss on drying | ≤% | 1 | 2 (105ºC,4h) | 1 (105ºC,4h) |
| Heavy metals | ≤ppm | -- | -- | 20 |
| As | ≤ppm | 3 | 1 | 3 |
| Cadmium | ≤ppm | -- | 1 | -- |
| Mercury | ≤ppm | -- | 1 | -- |
| Lead | ≤ppm | 2 | 1 | 5 |
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