Sodium Bisulfite Supplier :
Brief Introduction
|
Molecular formula |
NaHSO3 |
|
|
|
|
Molecular Mass |
104.061 |
|
CAS No |
7631-90-5 |
Specification
|
Sodium Bisulfite |
95% |
|
SO2% |
65% |
|
Water insoluble |
0.05% |
|
Iron (Fe)% |
50ppm |
|
Heavy metal (Pb) |
20ppm |
|
Arsenic (As) |
2ppm |
|
pH |
4.0-4.6 |
Characteristic
Being white crystalline solid with a pungent aroma of SO2, Sodium Bisulfate is able to dissolve in water. The solubility is 42g/100ml. And melting point is 150°C. When mixed with water, Sodium Bisulfite releases sulfur dioxide (SO2), a pungent, unpleasant smelling gas that can cause breathing difficulties to people.
Application
Food additive:
Sodium bisulfite is used in almost all commercial wines, to prevent oxidation and preserve flavor.
In fruit canning, sodium bisulfite is used to prevent browning (caused by oxidation) and to kill microbes.
Industrial reducing agent:
Also sodium bisulfite is a common reducing agent in the chemical industries. As it readily reacts with dissolved oxygen: 2NaHSO3+O2 --> 2Na+ + 2H+ + SO4 2-, it is usually added to large piping systems to prevent oxidative corrosion.
Deoxidant:
In biochemical engineering applications, it is helpful to maintain anaerobic conditions within a reactor.
Water treatment agent:
In purification, sodium bisulfite is also as a mild reducing agent. It can get rid of residual chlorine, hypochlorite salts, bromine, osmate esters, chromium trioxide and potassium permanganate. Meanwhile, it also used as a decoloration agent to remove oxidizing agents.
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