Abstract:
The present invention relates to cosmetic preparations for protection of the human skin and human hair against the harmful effects of ultraviolet solar radiation containing the water soluble UVA absorbing substance disodium phenyl dibenzimidazole tetrasulfonate [2,2'-(1,4-Phenylene)bis(1H-benzimidazole-4,6- disulfonic acid, monosodium salt); 1H-Benzimidazole-4,6-Disulfonic Acid, 2,2'- (1,4-Phenylene)Bis-, Disodium Salt] together with Benzophenone-4 (2-Hydroxy- 4-methoxybenzophenone-5-sulfonic acid) and its salts to quench the fluorescence of disodium phenyl dibenzimidazole tetrasulfonate.
Abstract:
The present invention relates to cosmetic preparations for protection of the human skin and human hair against the harmful effects of ultraviolet solar radiation containing the water soluble UVA absorbing substance disodium phenyl dibenzimidazole tetrasulfonate together with troxerutin to quench the fluorescence of disodium phenyl dibenzimidazole tetrasulfonate, and corresponding methods of manufacturing such preparations and uses of troxerutin and disodium phenyl dibenzimidazole tetrasulfonate.
Abstract:
The invention concerns preparations, particularly cosmetic or pharmaceutical/dermatological preparations, containing phenylbenzimidazole sulfonic acid (i.e. 2-phenylbenzimidazole-5-sulfonic acid) neutralised with basic amino acids such as arginine, lysine, ornithine and histidine so that the pH of the preparation can be at or below 7.0 without incurring crystallisation of the phenylbenzimidazole sulfonic acid.