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Industrial Chemicals
No.7320-34-5
Properties: Tetrapotassium pyrophosphate, is an inorganic compound, chemical formula K4P2O7, is a white powder, soluble in water, not soluble in ethanol
Detailed Applications
In industry: Used for cyanide electroplating and metal surface treatment, detergent, paint coating, dispersant and buffer
In food: used as a food additive
Specification
There are two types of products: industrial grade and food grade.
Tech grade：
| Items | Unit | Lower Limit | Upper Limit |
| Appearance | White powder | ||
| Purity | % | 96 | |
| Fe | ppm | 50 | |
| Water Insoluble | % | 0.08 | |
| Cl | % | 0.45 | |
| P2O5 | % | 41.2 | |
| Heavy metals as Pb | ppm | 50 | |
| Weightlessness of Burning | % | 2.0 | |
| pH Value | 10.0 | 10.7 | |
| Bulk Density | g/cm3 | 0.95 | 1.1 |
| Mesh | mesh | 20 | 100 |
| Maximum solubility in 25℃ | g/100g | 187 | |
Food grade：
| Items | Unit | Lower Limit | Upper Limit |
| Appearance | White granular or white powder | ||
| Purity | % | 98 | |
| Fe | ppm | 20 | |
| Water Insoluble | % | 0.08 | |
| Cl | % | 0.45 | |
| P2O5 | % | 41.2 | |
| Heavy metals as Pb | ppm | 10 | |
| Weightlessness of Burning | % | 2.0 | |
| pH Value | 10.0 | 10.7 | |
| Bulk Density | g/cm3 | 0.95 | 1.1 |
| Mesh | mesh | 20 | 100 |
| Maximum solubility in 25℃ | g/100g | 187 | |
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