Molecular formula: KBr CAS No.: 7758-02-3
Nomal Specification
Potassium Bromide
| Items | Photo First Grade | Photo Second Grade | Medical Grade |
|---|---|---|---|
| Main content | 99.5% min | 99.5% min | 99.0% min |
| Loss on drying | 0.3% max | 0.3% max | 0.5% max |
| Chloride | 0.2% max | 0.2% max | 0.5% max |
| Bromate | 0.001% max | 0.003% max | 0.005% max |
| Iodide | 0.001%max | 0.005% max | 0.005% max |
| Sulphate | 0.005%max | 0.005% max | 0.01% max |
| PH Value(5%) | 6.0 to 7.5 | 5.5 to 7.5 | 5.5 to 7.5 |
| As | =0.0004% | ||
| Pb | 0.2ppm max | 4ppm max | 10ppm max |
| Fe | 0.5ppm max | 4ppm max | 5ppm max |
| Cu | 0.5ppm max | 1.0ppm max | 1ppm max |
| Bi | 0.2ppm max | 0.5ppm max | |
| Peroxide solution penetrability(250g/l) | 93~100 (410nm) | 85~100(410nm) | |
| Transparency test | Qualified | Qualified | |
| Ammonia | 15.0ppm max | ||
| Peroxide solution chromaticity(250g/l) | (15.0 Black once)max | ||
| Packing | PP bag with PE inner bag/fibre drum,25kgs per bag/drum |