Sulfur dioxide gas is widely used in industry, but it is also a harmful gas with potential harm to the environment and human health.

Therefore, when using SO 2, it is necessary to strictly control emissions and comply with relevant environmental protection regulations to reduce the impact on the environment and humans.

Sulfur dioxide gas is commonly used in the following ways:

1. Chemical raw materials: Sulfur dioxide is an important raw material for the manufacture of sulfuric acid, which is the basic raw material for many other chemical products, such as dyes, pesticides, fertilizers, etc.

2. Bleaching agent: In the pulp and textile industry, sulfur dioxide can be used as a bleaching agent for bleaching materials such as paper, fibers, and wheat straw.

3. Food preservative: Sulfur dioxide can also be used as a preservative in food and beverages, especially in the processing of dried fruit, wine and some other foods, to prevent the growth and oxidation of microorganisms.

4. Petroleum industry additives: in the petroleum industry, sulfur dioxide can be used as an additive to improve the performance of oil products.

5. Refrigerant: Because of its liquid nature at low temperatures, sulfur dioxide can also be used as a refrigerant in some industrial processes.

6. Laboratory use: In the laboratory, sulfur dioxide is also often used in a variety of chemical experiments and analytical processes.