Sulfur Dioxide SO2
CAS No.: 7446-09-5
EINECS No.: 231-195-2
UN No.: UN1079
Dot Class: 2.3
Appearance: Colorless Liquid
Grade Standard: Industrial Grade
Top quality product
Colorless or yellowish transparent liquid
Accord with GB/T3637-2011 Top quality product index requirements
Precursor to sulfuric acid
Sulfur dioxide is an intermediate in the production of sulfuric acid, being converted to sulfur trioxide, and then to oleum, which is made into sulfuric acid.
Sulfur dioxide for this purpose is made when sulfur combines with oxygen. The method of converting sulfur dioxide to sulfuric acid is called the contact process.
As a preservative
Sulfur dioxide is sometimes used as a preservative for dried apricots, dried figs, and other dried fruits, it is also a good reductant.
As a refrigerant:
Being easily condensed and possessing a high heat of evaporation, sulfur dioxide is a candidate material for refrigerants.
Paper mill ; Glass Produce