Back ProductSodium thiosulfate (baking soda)
CAS NO.:7772-98-7
Molecular formula: Na2S2O3 · 5H2O
Molecular weight: 248.17
Physical and chemical properties: monoclinic crystal, melting point: 40-45 ℃, relative density: 1.729 (17 ℃...
Potassium sulfite solution
CAS No: 10117-38-1
Molecular formula: K2SO3
Molecular weight: 158.26
Physical and chemical properties: colorless and odorless transparent liquid, 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
Product specifications:
| Item |
Index |
| Appearance |
Colorless transparent liquid |
| Content (W/W)% |
44.0-45.0 |
| Color (black unit)≤ |
40 |
| Iron ≤% |
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 |
| PH（20℃ ） |
9.0-9.5 |
Phenylhydrazine