CAS No.:12124-97-9
Molecular formula:NH4Br
Uses: used for making photographic film emulsion, developer, wood preservative, water treatment and fire retardant additive
The detailed specifications are as below:
| Project | Photographic grade I | Photographic grade II | Superior product |
| Assay(Dry basis) | ≥99.5% | ≥99.5% | ≥99.0% |
| Water | ≤0.5% | ≤0.5% | ≤0.5% |
| Water insoluble matter | ≤0.005% | ≤0.01% | – |
| Chloride | ≤0.2% | ≤0.2% | ≤0.5% |
| Iodide | ≤0.001% | – | – |
| Sulfate | ≤0.005% | ≤0.005% | ≤0.01% |
| PH value (5%) | 4.5-6.0 | 4.5-6.0 | 4.5-6.0 |
| Arsenic | – | – | ≤0.0004% |
| Lead | ≤0.2ppm | ≤5ppm | ≤5ppm |
| Iron | ≤0.5ppm | ≤1ppm | – |
| Copper | ≤0.5ppm | ≤1.0ppm | – |
| Bismuth | ≤0.2ppm | ≤0.5ppm | – |
| Transmittance of aqueous solution (250g/l) | 93~100(410nm) | 85~100(410nm) | – |
| Clarity test | conform | conform | – |
| Chromaticity of aqueous solution (250g/l) | ≤15.0(Hazen) | – | – |
| packing | 25Kg/bag or 25kg/drum | ||