Sodium Sulphite
[ Molecular Formula ]: Na2SO3
[ Molecular Weight ]: 126.04
[
Appearance ]:
white crystal powder or granule, taste salt and with sulphur
odor. Easily soluble in water, slightly soluble in ethanol.
Very easily oxidize as Sodium Sulphate when open in the air.
Decompose when meet inorganic acid and give out the gas of sulfur
dioxide.
[ Specification ]:
Item |
superior |
first grade |
second grade |
| Na2SO3 |
97.0% min |
96.0% min |
93.0% min |
| Na2SO4 |
2.5% max |
- |
- |
| Fe |
0.003% max |
0.005% max |
0.01% max |
| Water insoluble |
0.02% max |
0.03% max |
0.05% max |
| Free alkali
(as Na2CO3) |
0.10% max |
0.40% max |
0.60% max |
| Heavy metals(as Pb ) |
0.002% max |
- |
- |
| As |
0.0002% max |
- |
- |
[ Applications ]: This product is mainly
used for producing photographic developer, anticorrosive agent
for food, bleaching agent for medicinal herbs,etc. And is
also used for producing sodium thiosulphate.
[ Packing ]: in 25 kg net plastic woven bag. |
