Item

Photographic grade

Industrial grade

Anhydrous grade

Appearance

colorless transparent crystal

colorless transparent crystal

white powder

Assay

≥99.00%

≥98.5%

≥97.0%

Water Insoluble matter

≤0.01%

≤0.03%

≤0.03%

Sulfide

≤0.001%

≤0.003%

≤0.001%

Fe

≤0.001%

≤0.003%

≤0.005%

PH

6.5~9.5

6.5~9.5

6.5~9.5

Water solution reaction

in accordance with the test

in accordance with the test

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Granularity(g/g)

12~16

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