Industrial grade; pharmaceutical grade; Photosensitive grade;
Appearance is white crystal;
Assay % ≥99.099.399.5
Chloride% ≤0.20.20.2
Sulfate PPM ≤20010050
Loss on dry% ≤0.50.50.3
Heavy metals (or Hg) PPM ≤5.05.03.0
Arsenic salt PPM ≤4.04.04.0
Volatile matter % ≤qualified 0.5
Bromate PPM ≤qualified qualified 10
Iodide PPM ≤qualified 50
Trace elements PPM≤qualified 0.5
PH value qualified qualified 6.0-8.0 |