Mainly used as sensitization film,photograph mulsion material; medicine,plastic,printing,foaming,water conservation,etc.

Items

Photo grade

Medical grade

Industrial grade

  Appearance

White crystal 

White crystal 

White crystal 

  Main content

≥

99.5%

99.0%

98.5%

  Loss on drying

≤

0.5%

1.0%

1.0%

  Chloride

≤

 0.3%

0.6%

1.5%

  Bromate

≤

0. 003%

Non-reaction

Non-reaction

  Iodide

≤

0.005%

Qualified

Qualified

  Sulphate

≤

0.01%

0.02%

0.1%

  PH （ 5% ）

5.5-8.5

5.5-9.5

5.5-9.5

  Arsenic

≤

0.2PPM

4PPM

/

  Pb

≤

0.2PPM

10PPM

/

  Fe

≤

0.5PPM

/

/

  Cu

≤

0.5PPM

/

/

  Transparency 

Qualified

/

/

  Packing

25KG PP bag with PE inner bag/25KG fibre drum