| Anhydrous sodium sulphite
Molecular Formula: Na2CO3
Molecular Weight: 126.04
CAS No:7757-83-7
Content:96%,97%,98%
Propertie: White crystalline
power, Specific gravity 2.633, soluble in water and slightly
soluble in ethanol. Its solution is one kind of basic fluid.
It is one kind of reductive matter and can be decomposed in
heat.
Uses: Mainly used
in printing, dyeing, drug, papermaking, chemical fiber, photo,
and food industry, etc
Technical
index |
High pure
|
Industrial
sodium sulphite |
Photographic
grade |
Sodium
sulphite |
Top
grade |
First
grade |
Sodium
sulphite |
| Na2CO3≥ % |
98.0 |
97.0 |
96.0 |
97.0 |
| Fe ≤ % |
0.003 |
0.003 |
0.005 |
0.002
|
| Water insoluble matter ≤ % |
0.01 |
0.02 |
0.03 |
0.05 |
| Free alkali (Na2CO3)
≤ % |
0.001 |
0.1 |
0.4 |
0.15 |
| Sodium sulfate (Na2CO3)
≤ % |
1.2 |
2.5 |
-- |
-- |
| Sodium chloride (NaCl) ≤ % |
0.003 |
0.1 |
-- |
-- |
| Heavy metals (as Pb) ≤ % |
0.001 |
-- |
-- |
0.002
|
| As ≤ % |
0.0001 |
-- |
-- |
-- |
| Sodium thiosulfate ≤% |
0.001 |
-- |
-- |
0.0015
|
| Appearance of solution |
qualified |
-- |
-- |
qualified
|
| Reaction in Tollens' reagent |
qualified |
-- |
-- |
qualified
|
|
