Wiktionary
dioxybenzone
n. (context organic compound English) An organic compound derived from benzophenone, used in sunscreen.
Wikipedia
Dioxybenzone
Dioxybenzone (benzophenone-8) is an organic compound used in sunscreen to block UVB and short-wave UVA ( ultraviolet) rays. It is a derivative of benzophenone. It is a yellow powder with a melting point of 68 °C. It is insoluble in water, but moderately soluble in ethanol and isopropanol.