Potassium bisulfite is a chemical compound commonly used as a food preservative and in the brewing and winemaking industries. It is also known by various alternative names such as potassium hydrogen sulfite, potassium acid sulfite, and potassium hydrogen sulfate. Additionally, it can be referred to as E224 in the European Union due to its function as a food additive. Other synonyms for potassium bisulfite include sulfuric acid, monopotassium salt, and potassium hydrogen sulfonate. This versatile chemical is prized for its ability to control the growth of microbes in food and drink products, while also acting as an antioxidant to prevent spoilage.