Potassium Bromide
Items
Photo First Grade
Photo Second Grade
Medical Grade
Main content
99.5% min
99.0% min
Loss on drying
0.3% max
0.5% max
Chloride
0.2% max
Bromate
0.001% max
0.003% max
0.005% max
Iodide
0.001%max
Sulphate
0.005%max
0.01% max
PH Value(5%)
6.0—7.5
5.5—7.5
As
—
≤0.0004%
Pb
0.2ppm max
4ppm max
10ppm max
Fe
0.5ppm max
5ppm max
Cu
1.0ppm max
1ppm max
Bi
Peroxide solution penetrability(250g/l)
93~100
(410nm)
85~100(410nm)
Transparency test
Qualified
Ammonia
15.0ppm max
Peroxide solution chromaticity(250g/l)
(15.0 Black once)max