Can avobenzone and octinoxate be used together?

Avobenzone and octinoxate degrade each other under UV light.

Evidence

Source:: Sayre RM et al. Photodermatol Photoimmunol Photomed. 2005;21(2):84-92
Applies to:: Formulations containing butyl methoxydibenzoylmethane
What this does not establish:: How a given product performs on your skin. Finished-product pH and concentration are rarely published, so this describes the chemistry, not a measurement of any specific product.
Last reviewed:: 2026-09-26

In practice

Avobenzone and octinoxate (ethylhexyl methoxycinnamate) react under UV light in a way that accelerates the breakdown of both. Where they appear together without a strong photostabiliser, measured protection can drop well below the labelled figure over a few hours of exposure.

Dermasift analyses skincare formulations against published cosmetic science. This is information, not medical advice — for a diagnosed skin condition, speak to a dermatologist.

Check this against a product’s ingredient list

Can avobenzone and octinoxate be used together?

Avobenzone and octinoxate degrade each other under UV light.

Evidence

Source:: Sayre RM et al. Photodermatol Photoimmunol Photomed. 2005;21(2):84-92
Applies to:: Formulations containing butyl methoxydibenzoylmethane
What this does not establish:: How a given product performs on your skin. Finished-product pH and concentration are rarely published, so this describes the chemistry, not a measurement of any specific product.
Last reviewed:: 2026-09-26

In practice

Dermasift analyses skincare formulations against published cosmetic science. This is information, not medical advice — for a diagnosed skin condition, speak to a dermatologist.

Check this against a product’s ingredient list