单词	benzophenone
释义	benzophenone /ˌbenzōfiˈnōn/ /-ˈfēˌnōn / noun A white, crystalline ketone that is used in perfume, sunscreen, and as a flavoring agent. Chemical formula: C6H5COC6H5. Many sunscreen products contain benzophenone or one of its derivatives.... 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. This molecule also displays photophysical properties that vary greatly from benzophenone, possessing both lower energy absorption and emission bands.
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