2-(((2,5-Dichloro-4-((4-diethylamino-2-methylphenyl)azo)phenyl)sulfonyl)amino)ethanesulfonic acid, sodium potassium salt 72828-66-1 Ethanesulfonic acid, 2-(((2,5-dichloro-4-((4-(diethylamino)-2-methylphenyl)azo)phenyl)sulfonyl)amino)-, potassium sodium salt