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Food additive sodium tripolyphosphate(STPP)
Food additive sodium hexametaphosphate(SHMP)
Food additive sodium pyrophosphate(TSPP)
Food additive sodium acid pyrophosphate(SAPP)
Food additive tripotassium phosphate(TKP)
Food additive monopotassium phosphate(MKP)
Food additive tetrapotassium pyrophosphate(TKPP)
Food additive potassium ferrocyanide
English name: Phosphorus pentoxide for industrial use
Molecular formula: P2O5
Relative molecular mass: 141.943 (according to 2016 international relative atomic mass)
Appearance: white powder, easy to deliquesce.
According to the test method specified in this standard, the industrial grade phosphorus pentoxide shall meet the requirements of Table 1.
|
Item |
index |
||
|
Superior |
First-class |
Qualified |
|
|
（P2O5）w/% ≥ |
99.0 |
98.5 |
98.0 |
|
Clarity degree |
Pass the test |
Pass the test |
Pass the test |
|
Water insoluble w /% ≤ |
0.01 |
0.01 |
0.02 |
|
Reducing substance (calculated by P2O3) w /% ≤ |
0.005 |
0.01 |
0.02 |
|
Total nitrogen (in N) w /% ≤ |
0.002 |
0.005 |
0.01 |
|
Heavy metal (in Pb) w /% ≤ |
0.002 |
0.002 |
0.005 |
|
Iron (Fe) w /% ≤ |
0.001 |
0.005 |
0.01 |
|
Arsenic (As) w /% ≤ |
0.003 |
0.006 |
0.01 |
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