Potassium bromide
Belongs to Category:
Product Description
Molecular Formula: KBr
CAS: 7758-02-3
Uses: Used in the emulsion of movie film and photographic film or in the preparation of developers; used as a sedative in medicine.
Packaging: 25kg woven bag with plastic liner or 25kg cardboard drum.
Item |
Photographic Grade 1 |
Photographic Grade 2 |
Superior Grade |
Main Content (Dry Basis) |
≥99.5% |
≥99.5% |
≥99.0% |
Water |
≤0.3% |
≤0.3% |
≤0.5% |
Chloride |
≤0.2% |
≤0.2% |
≤0.5% |
Bromate |
≤0.001% |
≤0.003% |
≤0.005% |
Iodide |
≤0.001% |
≤0.005% |
≤0.005% |
Sulfate |
≤0.005% |
≤0.005% |
≤0.01% |
PH value (5%) |
6.0—7.5 |
5.5—7.5 |
5.5—7.5 |
Arsenic |
— |
— |
≤0.0004% |
Lead |
≤0.2ppm |
≤4ppm |
≤10ppm |
Iron |
≤0.5ppm |
≤4ppm |
≤5ppm |
Copper |
≤0.5ppm |
≤1.0ppm |
≤1ppm |
Bismuth |
≤0.2ppm |
≤0.5ppm |
— |
Transmittance of aqueous solution (250g/l) |
93~100(410nm) |
85~100(410nm) |
— |
Clarity Test |
Qualified |
Qualified |
— |
Ammonia |
≤15.0ppm |
— |
— |
Color of aqueous solution (250g/l) |
≤15.0 black |
— |
— |
Packaging |
25kg/bag, drum; Cardboard drum or woven bag with plastic liner |
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