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| Items | Photo grade | Medical grade | Industrial grade |
| Appearance | White crystal | White crystal | White crystal |
| Main content | 99.5% | 99.0% | 98.5% |
| Loss on drying | ≤0.5% | 1.0% | ≤1.0% |
| Bromate | ≤30PPM | Non-reaction | Non-reaction |
| Chloride | ≤0.3% | ≤0.6% | ≤1.5% |
| Sulphate | ≤100PPM | ≤200PPM | ≤500PPM |
| Fe | ≤0.5PPM | —— | —— |
| Pb | ≤0.2PPM | Heavy metal≤10PPM | —— |
| Cu | ≤0.5PPM | —— | —— |
| Mercury | ≤3PPM | —— | —— |
| Iodide | ≤50PPM | —— | —— |
| Arsenic | ≤0.2PPM | ≤4PPM | —— |
| PH (5%) | 5.5-8.5 | 5.5-8.5 | —— |
| Packing | PE/PP bag PE inner bag/fibre pail 25kgs per bag/pail | ||