Mainly used as sensitization film,photograph mulsion material and photographic paper,and medicine,printing agents,etc.

Items

Photo Grade I

Photo Grade II 

Medical Grade

  Appearance

White crystal 

White crystal 

White crystal 

  Main content

≥

99.5%

99.5%

99.0%

  Loss on drying 

≤

0.5%

0.5%

1.0%

  Chloride

≤

0.2%

0.2%

0.5%

  Bromate

≤

0.001%

0.003%

Non-reaction

  Iodide

≤

0.005%

0.01%

/

  Sulphate

≤

0.005%

0.005%

0.02%

  PH （ 5% ）

6.0-7.5

5.5-7.5

5.5-7.5

  Arsenic

≤

/

/

0.0004%

  Pb

≤

0.2PPM

0.5PPM

10PPM

  Fe

≤

0.5PPM

1.0PPM

1.0PPM

  Cu

≤

0.5PPM

1.0PPM

1.0PPM

  Bi

≤

0.2PPM

0.5PPM

/

  Transparency 

Qualified

Qualified

/

  Packing

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