| White crystalline solid | Complying |
| Assay (T dry) | 99.5-100.5% |
| Barium (Ba) | Complying |
| Bromide (Br) | <= 0.01% |
| Calcium (Ca) | <= 0.002% |
| Chlolrate & Nitrate (as NO3) | <= 0.003% |
| Heavy metals (as Pb) | <= 0.0005% |
| Iodides (I) | <= 0.002% |
| Iron (Fe) | <= 0.0002% |
| Magnesium (Mg) | <= 0.001% |
| pH (5% in water at 25°) | 5.0-9.0 |
| Phosphate (PO4) | <= 0.0005% |
| Potassium (K) | <= 0.005% |
| Sulfate (SO4) | <= 0.004% |
| Water insolubles | <= 0.005% |