CALCIUM OXIDE is graded A** (Safe) by Expert·ING, based on COSING regulatory data.

CALCIUM OXIDE

Quicklime

Safety grade: A**

Calcium oxide is a white, caustic powder made from limestone that has been heated to very high temperatures. It's a strong alkaline substance commonly used in industrial applications.

In cosmetics, calcium oxide works as a buffering agent to neutralize and maintain the pH balance of products, ensuring they remain at safe and stable levels for skin application.

Graded using: COSING.

Last verified: May 26, 2026