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45%potassium sulfite
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50%Potassium thiosulfate
 
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45% Potassium sulfite solution (photographic grade)

Synonyms: Potassium sulfite solution; E225
Molecular formula: K2SO3
Molecular weight: 158.24
CAS No.: 10117-38-1         EINECS No.: 233-321-1
Properties: colorless and odorless transparent liquid, with reducing property.  Alkaline solution and unstable in air.

Technical / Photographic grade

Item

Photographic grade

     Appearance

clear, colorless solution

     Chroma ( Pt-Co )                               ≤

40

     Assay ( w/w )                                 %

44.0-46.0

     PH value ( Tech, 20C )

9.0-9.5

     Fe ( w/w )                                       %≤

0.001

     Sulfate  (K2SO4)  w/w                   %≤

0.7

     Thiosulfuric acid  (S2O32-) w/w    % ≤

0.006 

     Insoluble matter w/w                       %≤

0.005

     Density ( 20C )

1.436 - 1.460

Application:  Used as protective agent of fixer and  developer, reducing agent in dyeing and printing industry, bleaching agent of wool and silk; food grade can be used to preserve fresh fruit and vegetables.
Packing:  In plastic drums of 250kgs, or following your demands.

   
   

 

 
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