SODIUM PYROPHOSPHATE (SPP)

SODIUM PYROPHOSPHATE (SPP)

Chemical formula: Na4P2O7
Molecular weight: 265.9
Standard executed: HG/T2968-1988
Throughput: 5000M/y


Properties:White powder, easily soluble in water, density at 2.45, melting point at 890℃, its water solution is alkaline, PH value in 1% solution is 9.9~10.7


Application: Mainly used as detergent in washing, bleach in paper-making, and electroplating, etc. For food grade it is mainly used as food additive, buffering agent, emulsification agent, and nourishment, and modifying agent, etc.
Packaging:Plastic-woven sack with polythene inner bag, net weight at 25kg, 50kg or 1000kg. Store at a ventilated, dry place.

Technical specification

No
Specifications
Industrial grade
Food grade

1
Main contents%≥
96.5
96.5

2
Phosphorus pentoxide%≥
51.50
51.50

3
Phosphate
Qualified
Qualified

4
PH value of 1% solution
9.9—10.7
9.9-10.7

5
Fineness (through 60 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%≤
0.10
0.10