OLETH-100 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

OLETH-100

Safety grade: A

Oleth-100 is a gentle cleansing ingredient made from oleic acid (a natural fatty acid found in oils) that has been chemically modified to help mix oil and water together. It works like a soft detergent that removes dirt and makeup while being mild on skin.

This surfactant helps cleanse the skin by dissolving oils and dirt, allowing them to be rinsed away with water, while also helping to keep different ingredients in a product evenly mixed together.

Graded using: COSING.

Last verified: May 26, 2026