|
Item |
Premium grade(%) |
First grade(%) |
|
Assay(as H3PO3 ) |
99.0 |
98.0 |
|
Fe (as Fe ) |
0.0012 |
0.005 |
|
chloride(as Cl ) |
0.01 |
0.01 |
|
sulfate(as SO4 ) |
0.006 |
0.006 |
|
phosphate(as PO4 ) |
0.1 |
0.1 |
|
Appearance |
white crystal |
white crystal |
|
Aq.solution test(70%) |
colorless transparent |
colorless transparent without any impurities |
