Colorless toxic gas with a strong pungent and suffocating odor, readily liquefiable.It dissolves in water to form sulfurous acid, exhibiting acidity and reducibility.It is a hazardous substance of Category 2.3 (toxic) and Category 8 (corrosive), requiring high-pressure sealed storage and transportation.

1. Industrial core:Production of chemical products such as sulfuric acid, sulfur trioxide, sulfites, thiosulfates, and sodium dithionite.
2. Food processing:Food-grade product used as a reducing bleaching agent and preservative (e.g., in wine, fruit wine, dried fruits), inhibiting oxidase and microorganisms.
3. Industrial applications:Used as a refrigerant, organic solvent, and for lubricating oil refining; applied in the manufacture of pesticides, pharmaceuticals, man-made fibers, and dyestuffs.
4. Environmental protection & reagents:Flue gas desulfurization, preparation of standard gases, and as a reducing agent in organic synthesis.