Knowledge

Does Sodium Metabisulfite Contain Sulfa?

No, sodium metabisulfite does not contain "sulfa" in the context of sulfa drugs (such as sulfonamide antibiotics).

• Sodium metabisulfite is a chemical compound with the formula Na₂S₂O₅ and is commonly used as a preservative and antioxidant in food and wine.
• The term "sulfa" typically refers to sulfonamide medications, which are a class of antibiotics that contain the sulfonamide group (SO₂NH₂).
• Sodium metabisulfite contains sulfur, but it does not contain the sulfonamide group found in "sulfa" drugs.

Therefore, most people who have a "sulfa allergy" can usually tolerate sodium metabisulfite. However, individuals allergic to sulfites (a different type of sensitivity) may react to sodium metabisulfite.