Sulfur Dioxide, SO2 Industrial Gas

Sulfur Dioxide, SO2 Industrial Gas

Product Description



Sulfur dioxide (SO₂) is a colorless liquefied gas with a pungent odor. Dry gas is non-corrosive. Sulfur dioxide can be produced in a variety of ways, such as the combustion of sulfur or pyrite; or, as a by-product of smelter operations. It can also be prepared by the reaction of an acid with a metal sulfide, or by the direct action of sulfuric acid with a metal such as copper.

CAS No.

 7446-09-5

UN No.

 1079

EINECS No.

 231-195-2

Molecular weight

 64.07

Appearance

 colorless, pungent odor

Melting point

 -75.5 ℃

Boiling point

 -10 ℃

Density

 2.9275 kg/m³

DOT Class

 2.3 & 8

Label

 Toxic Gas, Corrosives

Application:

Sulfur dioxide is used to make sulfites, bisulfites and sulfuric acid.

Other applications include: shielding gas in magnesium foundries;

As bleach; disinfection and fumigation;

As a component of ambient calibration gas; automotive exhaust monitoring;

As a refrigerant; in laboratory studies of corrosion problems; removal of excess chlorine; preparation of chrome leather tanning; and as a solvent.

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