Octyl Methoxycinnamate is an organic compound that is an ingredient in some sunscreens and lip balms. It is an ester formed from methoxycinnamic acid and (RS)-2-ethylhexanol. It is a clear liquid that is insoluble in water. Its primary use is in sunscreens and other cosmetics to absorb UV-B rays from the sun, protecting the skin from damage. It is also used to reduce the appearance of scars.