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

SODIUM OXIDE

Safety grade: A

Sodium oxide is a chemical compound made from sodium and oxygen. It's used in cosmetics as a pH regulator to keep products at the right balance so they work effectively and feel comfortable on skin.

As a buffering agent, sodium oxide helps maintain a stable pH level in cosmetic formulations, ensuring the product is neither too acidic nor too alkaline for safe and effective use on skin.

Graded using: COSING.

Last verified: May 26, 2026