Colorless and tasteless transparent liquid, has reductibility 1, Chemical name:Potassium sulfite solution 2, Molecular formula: K2SO33, Molecular weight: 1584, Properties: Colorless and tasteless transparent liquid, has reductibility. The solution is slightly alkaline, unstable in the air. 5,Quality standard:

Item	Photo grade
Appearance	clear, colorless solution
Assay ,w/w	44-46%
Chroma (Pt-Co)	≤40
PH( 20°C)	9.0-9.5
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: Can be used in the protectant of the fixing solution or in the development on photosensitive industry. Also uses in the reductant of printing industry and the bleaching agent of wool and silk. . 

Potassium sulfite