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Potassium sulfite solution 45% (Photographic grade )

1. Product name: Potassium sulfite solution
2. Molecular formula: K2SO3
3. Molecular weight: 158
4. Physical and chemical properties: colorless, odorless, transparent liquid. Unstable in the air.
5. Technical index:

Item Photographic grade
Appearance clear and colorless solution
Color (Pt-Co) ,≤ 40
Content w/w % 44.0-46.0
pH value (stock solution 20°C) 9.0-9.5
Iron (Fe) w/w %≤ 0.001
Sulfate (K2SO4)w/w %≤ ≤0.7
Thiosulfate (S2O32-)w/w % ≤ ≤0.006
Insoluble matter w/w %≤ ≤0.005
Density (20°C) 1.436-1.460


6. Packing: 270kg plastic drum
7. Uses: fixing agent in photographic industry, as reducing agent in printing and dyeing industry, and as bleaching agent for wool and silk.

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