1. High reactivity: Sulfur dioxide is prone to react with various substances such as water, oxygen, and alkalis.
2. Bleachability: Sulfur dioxide can combine with colored substances to form colorless compounds, which are widely used for bleaching pulp, silk, straw, and other materials.
3. Anti corrosion and antibacterial: Sulfur dioxide can inhibit the growth of various microorganisms (such as bacteria and yeast), making it an efficient preservative and preservative.
4. Reductability: Sulfur dioxide has strong reducing ability and is used as a reducing agent in chemical production and waste gas treatment.