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中文Potassium Pyrophosphate
POTASSIUM PYROPHOSPHATE
Executive Standard: HG/T3591-1999
Chemical formula: K4P2O7
Molecular weight: 330.33
Characteristics: Potassium pyrophosphate, also known as pyrophosphate, 4 K, a white powder or solid block. The relative density of 2.534. Melting point 1109°C. Soluble in water, solubility 187g/100g water (25°C). Alkaline aqueous solution, 1% aqueous solution of pH = 10.2. Insoluble in ethanol. The properties are similar to other polyphosphates.
Technical Specifications:
S/N. | SPECIFICATIONS | INDUSTRIAL GRADE | FOOD GRADE | |
1 | Potassium pyrophosphate（ K4P2O7 ） | ≥
| 98 | 98 |
2 | PH of 1% water solution | 10-10.5 | 10-10.5 | |
3 | Phosphorus pentoxide | ≥
| 42.2 | 42.2 |
4 | Water insoluble | ≤ | 0.2 | 0.2 |
5 | Heave metals,as Pb | ≤ | 0.003 | 0.001 |
6 | Chloride,as Cl | ≤ | 0.005 | 0.001 |
7 | Ferrum(as Fe) | ≤ | 0.01 | 0.003 |
8 | Arsenic,as As | ≤ | 0.005 | 0.0003 |
9 | Orthophosphate | Qualified | Qualified | |
Uses: mainly used for cyanide-free plating complexing agent for metal surface cleaning agent, dye, dispersant and buffer.
Packing: Plastic knit bag , Net weight 25kgs/bag or 50kgs/bag . Storage in ventilated and dry plplace.