Hydroxides

Hydroxides are chemical compounds containing a negatively charged hydroxyl group (OH-). In food processing, they are often used in the form of metal hydroxides, such as sodium hydroxide or potassium hydroxide. These are typically produced through industrial chemical processes.

Hydroxides, particularly potassium hydroxide and sodium hydroxide, are primarily used as acidity regulators in food. They help to control the pH of food products, which can affect texture, flavour, and preservation. They are found in a variety of processed foods, including baked goods, confectionery, and some meat products.

Potassium hydroxide and sodium hydroxide are authorised food additives in Great Britain, listed on the Register of Food Additive Authorisations. They are used in small quantities to adjust acidity. At typical levels of use in food, they are not considered to pose a health risk. High concentrations can be corrosive, but this is not relevant to their use as food additives.