5-cyclohexadien-1-ylidene]-n-methyl-mino]-2-sulfophenyl]methylene]-hydroxid methanaminium,n-[4-[[4-(dimethylamino)phenyl][4-[ethyl[(3-sulfophenyl)methyl]a CI NO 42571 CI 42571 FAST ACID VIOLET 10B ACID VIOLET 10B ACID FAST VIOLET 10B hydrogen [4-[[4-(dimethylamino)phenyl][4-[ethyl(3-sulphonatobenzyl)amino]-2-sulphonatophenyl]methylene]cyclohexa-2,5-dien-1-ylidene]dimethylammonium, sodium salt