Appearance

White crystallization pellet or crystalline powder

Items

Photo Grade

Medical Grade

Technical Grade

Main content

99.5% min

99.0% min

98.5% min

Loss on drying

0.3% max

0.5% max

1.0% max

Chloride

0.3% max

0.6% max

1.5% max

Bromate

0.003% max

0.003% max

No reaction

Iodide

0.005% max

0.01% max

Qualified

Sulphate

0.01% max

0.02% max

0.1% max

PH Value(5%)

5.5—8.0

5.5—8.0

5.5—10.5

As

0.5ppm max

4ppm max

－

Pb

0.5ppm max

4ppm max

－

Fe

1ppm max

4ppm max

－

Cu

1ppm max

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Transparency  test

Qualified

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