Food GradeTetrapotassium Pyrophosphate
Molecular formula:K4P2O7
Molecular Weight:330.34
Quality standards:
| Name of index |
GB25562-2010 |
FCC-V |
E 450 (v) |
| Potassium Pyrophosphate K4P2O7(on dried material) ,≥% |
95.0 |
95.0 |
95.0(800 °C for 0,5 hours) |
| P2O5(on the anhydrous basis) |
- |
- |
42.0-43.7 |
| Test for potassium |
- |
- |
Passes test |
| Test for phosphate |
- |
- |
Passes test |
| Water-insoluble, ≤% |
0.1 |
0.1 |
0.2 |
| Arsenic (As) , ≤% |
0.0003 |
0.0003 |
0.0001 |
| Fluoride (as F) ,≤% |
0.001 |
0.001 |
0.001 |
| Loss on ignition , ≤% |
0.5 |
0.5 |
2.0(105 °C, 4 hours then 550 °C, 30 minutes) |
| Pb , ≤% |
0.0002 |
0.0002 |
0.0001 |
| PH(1 % solution) , % |
10.0-11.0 |
- |
10.0-10.8 |
| Heavy metals (as Pb) ,≤% |
0.001 |
- |
- |
| Cadmium ,≤% |
- |
- |
0.0001 |
| Mercury ,≤% |
- |
- |
0.0001 |