Sulfur Dioxide SO2
CAS No.: 7446-09-5EINECS No.: 231-195-2UN No.: UN1079Purity: 99.9%Dot Class: 2.3Appearance: Colorless LiquidGrade Standard: Industrial Grade
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.
As a preservative reducing agent: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.
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