Mainly used as sensitization film,photograph mulsion material, photographic paper and medicine, plastic,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%

Water Insolubles

≤

0.005%

0.01%

/

Chloride

≤

0.2%

0.2%

0.5 %

Iodide

≤

0.001%

/

/

Sulphate

≤

0.005%

0.005%

0.02%

PH （ 5% ）

4.5-6.0

4.5-6.0

4.5-6.0

Arsenic

/

/

0.0004%

Pb

≤

0.00002%

0.00005%

Heavy metal ≤ 10PPM

Fe

≤

0.00005%

0.0001%

——

Cu

≤

0.00005%

0.0001%

——

Bi

≤

0.00002%

0.00005%

——

Color Solution(250g/l)

≤

15.0

/

/

Light transmittance of the solution (250/l)

≤

93-100(410nm)

85-100(410nm)

/

Transparency

Qualified

Qualified

/

Packing

25KG PP bag with PE inner bag/25KG fibre drum，1000KG bag.