15773-36-1 2-Naphthalenecarboxylic acid, 4-((4-((4-(bis(2-hydroxyethyl)amino)phenyl)azo)phenyl)azo)-3-hydroxy- 4-((4-((4-(Bis(2-hydroxyethyl)amino)phenyl)azo)phenyl)azo)-3-hydroxy-2-naphthoic acid EINECS 239-866-1