Sodium Pyrophosphate (SPP)
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Chemical formula: Na4P2O7
Molecular weight: 265.9
Standard executed: HG/T2968-1999
Properties: White powder, easily soluble in water, relative density is 2.45, melting point is 8900, its water solution is alkaline, PH value in 1% solution is 9.9-10.7.
No Specifications Tech grade Food grade
1 Main contents(asNa4P2O7) %>=96.5 96.5
2 P2O5 %>= 51.5 51.5
3 Phosphate Qualified Qualified
4 PH value: 9.9-10.7 9.9-10.7
5 Fineness(through60 mesh) %>=90 90
6 Heavy metals, as Pb %<= 0.001
7 Arsenic, as As %<= 0.0003
8 Fluoride, as F %<= 0.005
9 Water insoluble %<= 0.2 0.2
Application: Mainly used as detergent in washing, bleach in paper-making, electroplating, etc. For food grade it is mainly used as food additive. Buffering agent, emulsification agent, and nourishment, and modifying agent, etc.
Packing: Plastic-woven sack with polythene inner bag, net weight:25kg, 50kg or 1000kg, Store at ventilated dry places.