Ethoxydiglycol as Solvent and Penetration Enhancer for Oil-Soluble Ingredients and Usage Limits

Ethoxydiglycol is known to be a solvent and carrier that can help deliver substances into the skin. It is soluble in water, glycols, ethanol, and natural oils. While it is soluble in oils, there is currently no experimental data confirming its effectiveness specifically for enhancing the penetration of oil-soluble ingredients into the skin.

Ethoxydiglycol has been shown to be effective in carrying water-soluble ingredients and is commonly used to enhance the delivery of ingredients like Dihydroxyacetone (DHA) in self-tanning formulations.

The recommended usage rate for Ethoxydiglycol varies depending on the product type and local regulations. Based on current information, the usage limits are:

• Not more than 2.6% for leave-on or skin spray products.
• Not more than 5% for non-oxidative hair coloring products.
• Not more than 7% for oxidative hair coloring products.
• Not more than 10% for rinse-off products (such as shampoo, soap).