E228 – Potassium hydrogen sulphite

Description

Potassium bisulfite; white crystalline powder or colorless solution with a sulfur dioxide odor

Risks

Notes

Potassium bisulfite is a white crystalline powder created by combining potassium with sulfur dioxide. This compound is manufactured industrially by treating potassium hydroxide or potassium carbonate with sulfur dioxide gas, resulting in crystals that dissolve easily in water. Like other sulfite compounds, it releases sulfur dioxide when dissolved, which is the key to its preservative properties. As a preservative and antioxidant, potassium bisulfite prevents bacterial growth and stops foods from deteriorating due to oxygen exposure. It's widely used in the wine and brewing industries to prevent spoilage and maintain flavor quality. You'll also find it in dried fruits (helping them maintain their color), fruit juices, pickled foods, and some processed seafood products. It's particularly effective at preventing the browning that occurs when fruits and vegetables are cut or processed. Potassium bisulfite is suitable for vegetarian and vegan diets and is generally acceptable under religious dietary laws since it's made from mineral sources. However, it carries the same important health warning as other sulfites: people with asthma or sulfite sensitivity can experience reactions ranging from mild discomfort to severe respiratory problems. This is why regulations in many countries require clear labeling of sulfite-containing foods. If you have asthma or known sulfite sensitivity, it's important to read ingredient lists carefully and avoid products containing this preservative.