Octylmethoxycinnamate (OMC), also known as octinoxate or ethylhexylmethoxycinnamate, is an organic compound and UV filter that's commonly usedin sunscreens and lip balms. Chemical composition: An ester formed frommethoxycinnamic acid and 2-ethylhexanolPhysical properties: A liquidthat's insoluble in water. Sun protection: Absorbs UVB rays but not UVA rays.Usage: Used in 210% concentrations in over-the-counter sun protectionproducts, personal care products, baby sun care, daily skin care, anddecorative cosmetics with sun protection.