Calcium oxide (E529) – what is it?
Calcium oxide, commonly known as quicklime, is an inorganic chemical compound with the formula CaO. In the food industry, it is registered as a food additive under the symbol E529. It is obtained by burning limestone at temperatures above 900°C, which releases carbon dioxide and leaves pure calcium oxide.
E529 is valued for its hygroscopic properties and ability to increase pH. In the food industry, it is used both as an acidity regulator and as a source of calcium, an important mineral for bone and dental health.
Properties of calcium oxide
Calcium oxide is strongly alkaline and exhibits hygroscopic properties, meaning it can absorb moisture from the environment. Thanks to its alkaline action, it is an effective agent in neutralizing acids, which helps regulate the pH in food products.
Calcium oxide applications
E529 is used in various sectors of the food industry, including sugar production, as a clarifying agent for sugar juice, and in fruit and vegetable processing, where it helps maintain cell structure. It is also used in the manufacture of dietary supplements as a source of calcium.
Where to buy calcium oxide?
Calcium oxide (E529) is available at specialty stores with raw materials for the food industry and online stores offering industrial chemicals. It is important to purchase from trusted suppliers, due to the need to use the product in accordance with recommended safety standards.
Calcium oxide and its functions in food
As a food additive, E529 plays a key role in pH regulation, which is important for improving taste, shelf life and food safety. In addition, its use as a source of calcium contributes to enriching the nutritional value of food products, supporting the bone and dental health of consumers.
