Definition of benzophenone in US English:

benzophenone

noun

  • A white, crystalline ketone that is used in perfume, sunscreen, and as a flavoring agent.

    Chemical formula: C₆H₅COC₆H₅

    • ‘However, application to the skin is problematic because the photosensitizing properties of the benzophenone moiety may cause phototoxic effects when the treated skin region is exposed to UVA light.’
    • ‘Many sunscreen products contain benzophenone or one of its derivatives.’
    • ‘This molecule also displays photophysical properties that vary greatly from benzophenone, possessing both lower energy absorption and emission bands.’
    • ‘Allergencity has been associated with several sunscreens over the years, including PABA (4-aminobenzoic acid) and its derivatives, benzophenones and dibenzoylmethanes, many of which have now been withdrawn from the market.’
    • ‘Chemical UVA absorbers, such as benzophenones and benzotriazoles in varying strengths, in conjunction with the film's polyester base, screen out almost 100 percent of UVB and UVA, without reducing visibility.’

Pronunciation

benzophenone

/ˌbenzōfiˈnōn/