Is Calcium Oxide vegan?

Calcium Oxide

Vegan

Calcium Oxide, also known as quicklime, is an inorganic compound obtained by calcination of limestone (calcium carbonate). It is used as an acidity regulator and processing aid in food and cosmetic products.

Also known as Burnt lime, Calx, Lime, Quicklime
INCI name Calcium Oxide
E number E529
CAS number 1305-78-8
EC number 215-138-9
CosIng ID 74908
Last reviewed 22 April 2026

Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.