Chemical formula: Na4P2O7
Molecular weight: 265.9
CAS No.: 7722-88-5
EINECS No.: 231-767-1
H.S CODE:28353990
Tetra Sodium Pyrophosphate (TSPP)
White powder or crystal. The relative density is 2.534, the melting point is 880 ° C, and the boiling point is 938 ° C. Colorless transparent crystal or white crystalline powder. Soluble in water, the solubility in 100g water at 20 ° C is 6.23, its aqueous solution is alkaline; insoluble in alcohol.
Technical Specifications
| item | standard | |
| sodium pyrophosphate anhydrous(Na4P2O7) | sodium pyrophosphosphate decahydrate(Na4P2O7·10H2O) | |
| main content ,≥% | 96.5~100.0 | 98.0 |
| water insoluble,≤% | 0.20 | 0.10 |
| PH value(10g/L, aqueous solution ) | 9.9~10.7 | |
| orth phosphate | pass | |
| Arsenic(As),≤% | 0.0003 | |
| Heavy Metal(as Pb),≤% | 0.001 | |
| Fluoride(as F),≤% | 0.005 | |
| Loss on drying,% | ≤0.50 | 38.0~42.0 |
Industrial Grade Tetra Sodium Pyrophosphate(TSPP)application:.
Totally,mainly used as in industry as detergent auxiliary , paper production to bleach and electroplatingy.It is used for electroplating baths to form complexes together with Fe;For woolen industry as degreasing angent as well as bleaching agent;For Paper industry as decolorizer;For printing and dyeing industry as auxliary agent;For toothpast industry as additive to form colloid together with Dicalcium phosphate;For water treatment industry as water softner;For machanic industry as rust remover.
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