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|
Item |
Food grade |
Industry grade |
Test Result |
|
Appearance |
White crystal powder or granule |
Meet the standard |
|
|
Solubility |
Easily soluble in water, slightly soluble in alcohol and insoluble in ether |
Meet the standard |
|
|
Identitification |
Meet the standard |
Meet the standard |
Meet the standard |
|
Assay,% |
99.0 min |
98.0 min |
99.2 |
|
Moisture,% |
0.50max |
1.0max |
0.35 |
|
Reduzate,% |
0.50 max |
1.0 max |
0.26 |
|
Sulfate,% |
0.05 max |
0.2 max |
0.03 |
|
Chloride,% |
0.07 max |
0.1 max |
0.04 |
|
Pb,ug/g |
1 max |
2 max |
1 max |
|
Arsenic salt,ug/g |
2 max |
2 max |
2 max |
|
Heavy metals,ug/g |
20 max |
20 max |
20 max |
|
PH |
6.2-7.8 |
6.2-7.8 |
7.2 |
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