E261

E261 is the European Union's food additive code for potassium gluconate. It is the potassium salt of gluconic acid. Potassium gluconate is commonly used as a food additive, primarily as an acidity regulator and a firming agent. It can also function as a nutrient supplement, providing potassium. In food production, it helps to maintain a stable pH level in various products and can contribute to the texture of fruits and vegetables.

This substance is produced by the neutralization of gluconic acid with a potassium source, typically potassium hydroxide or potassium carbonate. Gluconic acid itself is derived from the oxidation of glucose. Potassium gluconate is generally recognized as safe (GRAS) by regulatory bodies when used within specified limits. It is soluble in water and has a slightly salty taste. Its applications are found in a range of food categories, including processed fruits and vegetables, dairy products, and baked goods. The E number E261 signifies its approval for use as a food additive within the European Union.