SODIUM SULPHITE Technical
sheet
Sodium Sulphite, its
molecular formula is
Na2SO3 and its weight is
126.04
Physical character
White or
light yellow powder, relative condense 2.633 in
moist. It dissolves in water and glycerine and
little in ethanol. Decomposed in humid,
oxygenized into sodium sulfate by exposed in
air, sulpher dioxide will be released when it
contacts with strong acid and then created the
relative
salt.
Application
Medicine
industry: Used for manufacturing
trichloromethane, sulphetrone and
benzaldohyde.
Dye-industry: Used as
dechlorination agent and cotton boiling-off
agent for bleached cotton.
Leather industry:
It can make leather soft, well-developed, tough
water proof, wear-ability and etc.
Chemical
industry: Used for manufacturing hydrochloride
hydroxylamine and etc.
Light-sensitive
industry: Used as developer and
others.
Quality standard(in accordance
with GB9005-88)
1. Appearance: Sodium
Sulphite grade #1 is white crystal powder.
2. Sodium Sulfite shall meet the following
requirements:
| Name of parameter |
#1grade |
#2grade |
#3grade |
| Main content(Na2SO3)
min |
97.0% |
96% |
93% |
| Content of iron(Fe), max |
0.003% |
0.005% |
0.01% |
| Na2CO3 max |
0.1% |
0.4% |
0.6% |
| Na2SO4 max |
2.5% |
|
|
| NaCL max |
0.10% |
|
|
Caution The product is very easy to be oxidized
when exposed to air and emit sulfur dioxide
continuously, so it is difficult to store the
product for a long time in open air and it is
necessary to protect the product from moisture.
The product will disintegrate when heated above
150℃ and emit sulfur dioxide gas, so the product
cannot be stored and transported together with
gasoline, acids or oxidants and other
inflammable substances. The product is packed in
internal plastic sacks and external braided
sacks according to net weight of 50 kg.
Product for export is packed according to
net weight of 25
kg |
