Sulfur dioxide (chemical formula: SO2) is the most common sulfur oxide. SO2 is a colorless toxic gas with obvious pungent odor and is one of the main pollutants in the atmosphere, soluble in water, ethanol and ethyl acid. Liquid sulfur dioxide is relatively stable and inactive, gaseous sulfur dioxide heated to 2000 degrees Celsius does not decompose, does not burn, and does not form an explosive mixture with air.

Scope of Application:

1. Used as organic solvent and refrigerant, and used for refining various lubricants.

2. Mainly used in the production of sulfur trioxide, sulfuric acid, sulfite, thiosulfate, also used as fumigants, preservatives, disinfectants, reducing agents and so on.

3. Sulfur dioxide is a reducing bleach permitted in China. It has a strong inhibitory effect on bleaching of food and oxidase in plant food. China stipulates that it can be used for wine and fruit wine, with a maximum usage of 0.25g/kg, and the residual amount shall not exceed 0.05g/kg.

4. Pesticides, artificial fibers, dyes and other industrial sectors.

5. Used for the production of sulfur and as insecticides, fungicides.