Synonyms: diphosphoric acid, tetrapotassium salt; potassium pyrophosphate; tetra-potassium pyrophosphate; tkpp; tetrapotassium pyrophosphate; tetrapotassium diphosphate
Molecular weight: 330.3365
Molecular formula: k4o7p2
Melting point(℃): 1109℃
Water solubility: soluble
Cas rn.: 7320-34-5
Einecs: 230-785-7
White powder or block. The relative density is 2.534. The melting point is 1109°C. Soluble in water, insoluble in ethanol. The aqueous solution is alkaline. The solubility in 100g water at 25°C is 187g. The pH of 1% aqueous solution is 10.2. Potassium pyrophosphate has all the properties of other condensed phosphates.
Used for cyanide-free electroplating, dyeing, refining clay, etc.
Items | Technical Grade | Food Grade | |
Main content (K4P2O7) | ≥ | 95.0% | 96.0% |
Water insoluble matter | ≤ | 0.2% | 0.1% |
Iron (Fe) | ≤ | 0.05% | 0.03% |
PH value | 10.0-10.7 | 10.0-10.7 | |
Heavy metal (Pb) | ≤ | / | 0.001% |
Arsenic (As) | ≤ | / | 0.0003% |
Ortho Phosphate | Pass test | ||
Appearance | White powder or granula | ||
In 25kg PE+PP bag.
Phosphides & Phosphates
Phosphides & Phosphates
Phosphides & Phosphates
Phosphides & Phosphates
Phosphides & Phosphates
Phosphides & Phosphates
Phosphides & Phosphates
Phosphides & Phosphates
Phosphides & Phosphates
Phosphides & Phosphates
Phosphides & Phosphates
Phosphides & Phosphates
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In China, we have established a strong business foundation and have set up office in Shanghai, focusing on providing customers with supply chain solutions for specialty chemicals as well as international sourcing and distribution services.