2-Phenyl-5-benzimidazolesulfonic acid has been reported as UV filter. It is a xenobiotic compound detected in in gray water from houses and effluents of the biological treatment systems (aerobic, anaerobic, and combined anaerobic+aerobic).
P 5255 (OTTO) 2-Phenyl-5-benzimidazolesulfonic acid, 98% Cas 27503-81-7 - used for the fabrication of biomimetic sensor for determination of 4-methylbenzylidene camphor (4-MBC), an ultraviolet (UV) radiation protector.