Calcium Oxide (E529)

Type of additive
(Glossary)		Acidity Regulators
Leavening Agents
E NumberE529
Chemical FormulaCaO
Also Known AsLime
Quicklime
Burnt lime
Unslaked lime
Free lime (building)
Caustic lime
Pebble lime
Calcia
Oxide of calcium

Purpose and Function

Calcium oxide is primarily used as an acidity regulator in food applications:

  • Acidity Regulator: It helps maintain pH levels in food products, contributing to flavor and preservation.
  • Food Processing: Calcium oxide is used in the processing of certain foods, including corn processing (nixtamalization).
  • Nutritional Enhancer: It provides calcium, which is essential for various bodily functions, including bone health.
  • Improves Shelf Life: By stabilizing food products, calcium oxide helps enhance shelf life and prevent spoilage.

Potential Risks and Side Effects

Calcium oxide is generally regarded as safe for consumption. However, some considerations include:

  • Gastrointestinal Issues: Excessive intake may lead to gastrointestinal discomfort, including bloating or gas, particularly for those sensitive to calcium.
  • Corrosive Nature: It can cause burns if mishandled and should be used with care.
  • Contaminants: Sourcing from reputable suppliers is essential to minimize the risk of contaminants in food formulations.