Sulfur dioxide

Definition

Sulfur dioxide (SO2) is a chemical compound used as a disinfectant and preservative. It effectively inhibits the growth of bacteria, molds, and yeasts.

5 Must Know Facts For Your Next Test

1. Sulfur dioxide disrupts cellular processes in microorganisms by denaturing proteins and enzymes.
2. It is commonly used in food preservation to prevent microbial spoilage.
3. In winemaking, sulfur dioxide helps maintain the quality of wine by controlling unwanted microbial growth.
4. While effective, sulfur dioxide can be toxic and cause respiratory issues in high concentrations.
5. Microbial resistance to sulfur dioxide is relatively low compared to other chemical agents.

Review Questions

• How does sulfur dioxide inhibit the growth of microorganisms?
• What are some common applications of sulfur dioxide in controlling microorganisms?
• Why must care be taken when using sulfur dioxide as a disinfectant or preservative?

Related terms

Disinfectant: A substance that destroys or inhibits the growth of microorganisms.

Preservative: A substance used to prevent the decomposition of organic matter by microbial action.

Enzyme Denaturation: The process by which an enzyme loses its functional shape due to external stress or compound interactions.