Potassium sulfite solution
Potassium sulfite solution
CAS No: 10117-38-1
Molecular formula: K2SO3
Molecular weight: 158.26
Physical and chemical properties: colorless transparent, with reducing properties. The solution is weakly alkaline. It is unstable in the air.
Usage: It can be used as a developing agent for the photosensitive industry or as a protective agent for the fixing solution. It is also used as a reducing agent in the printing and dyeing industry, as a bleaching agent for wool and silk.
Packing: 270kg plastic drum
Specification Standard: Q/320681GAI07-2021
Structural Formula：.jpg)
Product specifications:
| Item | Index |
| Appearance | Colorless transparent liquid |
| Content (W/W)% | 44.5-46.0 |
| Color (black unit)≤ | 40 |
| Heavy metals(Pb)w/w: %≤ | 0.002 |
| Iron(Fe) w/w: %≤ | 0.001 |
| Sulphate ≤% | 0.7 |
| Thiosulfate ≤% | 0.006 |
| Insoluble matter (precipitation of calcium and magnesium) ≤% | 0.2 |
| Insoluble matter ≤% | 0.005 |
| Specific gravity (20℃) | 1.436-1.460 |
| Density (20℃) | 1.437-1.457 |
| pH（25℃ Stock solution） | 9.0-9.5 |
