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colorless or white crystals, or white crystalline granular or powder. It is hygroscopic. It is very soluble in water, but is insoluble in alcohol. The pH of a 1:100 aqueous solution is about 10.5.
tetra potassium phosphate is in white powder or granular. Relative density 2.534 g/cm3 and melting point 1109°C; It is apt to absorb humidity in the open air to deliquescent; Soluble in water but insoluble in ethanol, and at 25°C,its solubility in water is 187g/100g water; It can chelate with alkaline metals ions or heavy metal ions.
| NO | Specifications | Industrial Grade | Food Grade |
| 1 | Appearance | White powder or granular | |
| 2 | Assay % ≥ | 96.0 | 96.0 |
| 3 | Iron(Fe) % ≤ | 0.03 | 0.03 |
| 4 | Water insoluble matter % ≤ | 0.1 | 0.1 |
| 5 | Heavy Metals,as Pb % ≤ | 0.001 | |
| 6 | Arsenic(As) % ≤ | 0.0003 | |
| 7 | PH Value | 10.0-10.7 | |
| 8 | Ortho Phosphate | Pass test | |
It mainly applied to electroplating without cyanate, industrial or household detergents; It can used as a buffering reagent as well as stabilizer for hydrogen peroxide; It can also be used as dispersion agent for ceramic, clay, latex and pigments etc.
