Calcium oxide (E529)
Updated October 2, 2026
Calcium oxide (E529) is a food additive in the “other additives” group. It appears in 50 products in our database, 16 of them sold in the US.
Quick facts
- Also known as
- E529
- E-number
- E529
- Function
- Other additives
- Found in
- 50 products (16 sold in the US)
Foods that commonly contain Calcium oxide
Share of published products in each category whose ingredient list includes Calcium oxide.
Popular products with Calcium oxide
e NOVA 4 
e NOVA 4 How to spot Calcium oxide on a label
Look for any of these names in the ingredient list:
Related additives
Frequently asked questions
What foods contain Calcium oxide?
In our database, Calcium oxide most often appears in papadum, dagligvarer, frozen desserts and special breads.
How many products contain Calcium oxide?
50 published products on Foodmetria list Calcium oxide, including 16 sold in the United States. Counts come from ingredient lists in Open Food Facts and update daily.
Product data: Open Food Facts (ODbL), updated daily. Additive information is for general education and is not medical advice. Always check the package label. Our methodology.