1,5-Dihydroxy-4,8-bis((4-methylphenyl)amino)anthraquinone 1,5-Dihydroxy-4,8-p-toluidinoanthraquinone 20241-75-2 9,10-Anthracenedione, 1,5-dihydroxy-4,8-bis((4-methylphenyl)amino)- EINECS 243-631-9 NSC 227205 Toluidine Blue Base