Potassium Bromide Photo Grade

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—7.5

5.5—7.5

5.5—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

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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

—

—