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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