45% Potassium sulfite solution (Photographic grade)
1, English name:Potassium sulfite solution
2, Molecular formula: K2SO3
3, Molecular weight: 158
4, Properties: Colorless and tasteless transparent liquid, has reductibility. The solution is slightly alkaline, unstable in the air.
5, Technical index :
| Item |
Photographic grade |
| Appearance |
clear, colorless solution |
| Chroma (Pt-Co), ≤ |
40 |
| Assay w/w % |
44.0-46.0 |
| PH( Tech 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. |
