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 Products
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
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Item
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Photographic grade
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Appearance
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clear, colorless solution
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Chroma ( Pt-Co )
≤
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40
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Assay ( w/w )
%
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44.0-46.0
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PH value ( Tech, 20°C
)
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9.0-9.5
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Fe ( w/w )
%≤
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0.001
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Sulfate (K2SO4)
w/w
%≤
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0.7
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Thiosulfuric acid
(S2O32-) w/w %
≤
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0.006
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Insoluble matter w/w
%≤
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0.005
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Density ( 20°C )
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1.436 - 1.460
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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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