Sulfur Dioxide
Also known as: Sulphur dioxide
AntioxidantsPreservativesLeavening Agents
Safety rating
Use Sparingly
Eat Away!Generally SafeUse SparinglyAvoid
Purpose and Function
Sulfur dioxide is a preservative and antioxidant used for centuries to prevent spoilage and maintain color and freshness, also acting as a color stabilizer and bleaching agent in some applications.
Commonly found in
- —Dried fruits (especially apricots)
- —Wine and fruit juices
- —Pickled vegetables
- —Starches and sugar syrups
Key functions
- —Prevents bacteria, yeast, and mold growth
- —Prevents oxidative browning
- —Stabilizes color
Potential Risks and Side Effects
- 01Can irritate the respiratory tract, particularly in people with asthma — wheezing, shortness of breath, chest tightness
- 02Can cause allergic reactions in sulfite-sensitive individuals — hives, nausea, upset stomach
- 03Can degrade certain vitamins, particularly thiamine (vitamin B1)