CASR |
: | 7664-38-2 |
Molecular Formula |
: | H3PO4 |
Molecular Weight |
: | 98 |
| Specifications | |
|---|---|
| Description: | A clear, colourless, syrupy liquid; corrosive, when kept at a low temperature it may solidify, producing a mass of a colourless crystals which do not melt until the temperature reaches 28°C |
| Solubility: | Miscible with water and with ethanol(95%) |
| Identification A: | The solution is strongly acidic. |
| Identification (Phosphate A): | A light yellow precipitate should form whose colour does not change by boiling and which dissolves on addition of ammonia |
| Identification (Phosphate B): | A white crystalline precipitate should form. |
| Identification (Phosphate C): | A bright yellow precipitate should form. |
| Appearance of Solution: | Clear and colourless solution. |
| Arsenic (As): | NMT 2ppm |
| Heavy metals: | NMT 10ppm |
| Iron (Fe): | NMT 60ppm |
| Chloride (Cl): | NMT 50ppm |
| Sulphate (SO4): | NMT 100ppm |
| Alkali Phosphates: | No turbidity should produced. |
| Aluminium and calcium: | The solution remains clear. |
| Hypophosphorus acid and phosphorous acid: | The appearance of the solution does not change. |
| Assay: | 84.0%-90.0% w/w |
