CASR |
: | 7664-38-2 |
Molecular Formula |
: | H3PO4 |
Molecular Weight |
: | 98 |
| Specifications | |
|---|---|
| Appearance/Description: | Clear, Colourless, odourless, syrupy liquid .Corrosive |
| Solubility: | Miscible with water, with alcohol and with ethanol (96%) |
| Identification (By chemical test): | The solution should strongly acidic. |
| 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 (Phosphate 2): | With ammonium molybdate solution, acidified solutions should yield a yellow precipitate that should soluble in 6N ammonium hydroxide. |
| Identification (Phosphate 3): | A yellow precipitate should form whose colour does not change by boiling and which dissolves on addition of ammonia. |
| Identification (Phosphate 4): | A yellow color should develop |
| Appearance of solution: | Clear and colorless solution |
| Assay: | 85.0% - 88.0% w/w |
| Limit of Nitrate: | The blue color should not discharge within 1 minute. |
| Chloride & Sulfate: Sulfate: | No precipitate should form immediately |
| Sulphate (SO4): | NMT 100ppm |
| Alkali Phosphate: | No turbidity should produce. |
| Phosphorous or Hypophosphorous acid: | The mixture should not become brownish. |
| Relative density, 20°C: | About 1.7 |
| Substance precipitated with ammonia(NH4): | Any opalescence in the solution should not be more intense than that of reference solution |
| Hypophosphorus acid and phosphorous acid: | The solution should not show change in appearance |
| Chloride (Cl): | NMT 50ppm |
| Arsenic (As): | NMT 2ppm |
| Iron (Fe): | NMT 50ppm |
| Specific gravity: | About 1.71 |
