Sulfur dioxide is a colorless gas at room temperature with a pungent odor. It has strong permeability, can penetrate into various gaps quickly, and is easily absorbed by items, especially wet items. Sulfur dioxide is toxic to humans, and the maximum allowable concentration in the air is 15mg/m3.
Sulphur dioxide may be produced by a variety of routes, such as the combustion of Sulphur or pyrites, alternatively as a by-product of smelter operations.
It can also be prepared by the reaction of an acid on a metallic supplied, or by the action of sulphuric acid directly on a metal such as copper.
| Gas | Sulphur Dioxide |
| CAS No. | 7446-09-5 |
| Purity | 99.95% |
Sulphur dioxide is used in the manufacture of sulphite, hydrogen sulphites and sulphuric acid.
Sulphur dioxide is used to sterilize wine and beer making equipment in order to imhibit the growth of moulds and bacteria, and to control wine fermentation. Sulphur dioxide may be used in a variety of disinfecting and fumigation applications.
Sulphur dioxide is used as a bleaching agent particularly for certain types of dried food, and also to bleach glue, elation, sugar, textiles, fats and oils.
Sulphur dioxide is used in gas mixtures for car emission monitoring.
Sulphur dioxide is also used in the float glass manufacturing process.
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