| Minimum assay (calculated to the dried material) |
99.8% |
| pH (5% solution) |
6.0 - 9.5 |
| Water-insoluble matter |
Max. 0.003% |
| Loss on drying |
Max. 0.5% |
| Chloride and bromide (Cl) |
Max. 0.01% |
| Iodate (IO3) |
Max. 0.0002% |
| Nitrogen compounds (N) |
Max. 0.001% |
| Phosphate (PO4) |
Max. 0.001% |
| Sulphate (SO4) |
Max. 0.0025% |
| Arsenic (As) |
Max. 0.00001% |
| Barium (Ba) |
Max. 0.001% |
| Calcium (Ca) |
Max. 0.0005% |
| Copper (Cu) |
Max. 0.0002% |
| Iron (Fe) |
Max. 0.0002% |
| Lead (Pb) |
Max. 0.0002% |
| Magnesium (Mg) |
Max. 0.0005% |
| Sodium (Na) |
Max. 0.1% |
| Iodine reducing substances (I) |
Max. 0.001% |
