Ultra-violet radiation absorbing compositions and compounds therefor

摘要: The novel compound 1,3-bis-(5-sulphobenzimidazolyl-2) benzene and/or a salt thereof, is prepared by sulphonating 1,3-bis-(benzimidazolyl-2) benzene, e.g. with chlorosulphonic acid in H2SO4 and, if desired, converted to salts such as the sodium, potassium, ammonia and mono-, di- tri-ethanolamine salts. 1,3-Bis-(benzimidazolyl-2) reacting o-phenylene diamine isophthalic or reactive derivative chloride, amide aldehyde, presence of condensation agent polyphosphoric acid. material can also be obtained reduction di-o-nitranilide.ALSO:A composition, capable absorbing U.V. radiation, comprises active ingredient 1, 3-bio-(5-sulpho-benzimidazolyl-2) an inert physiologically acceptable carrier suitable for topical application. itself ammonium, are particularly preferred. These compounds may incorporated into solutions, jellies, creams sprays application conventional additives perfumes, skin-conditioning agents insect repellents well other sodium 2-phenylbenzimidazole-5-sulphonic 3, 4-dimethylphenylglyoxylic 4-phenylbenzophenone 4-phenylbenzophenone-2\sv-carboxylic isooctyl ester. compounds, sulphonic class, shield skin from harmful radiation short wavelengths.