2-Naphthalenecarboxylic acid, 3-hydroxy-4-((2-methoxy-4-nitrophenyl)azo)- 3-Hydroxy-4-((2-methoxy-4-nitrophenyl)azo)-2-naphthoic acid 4-((2-Methoxy-4-nitrophenyl)azo)-3-hydroxy-2-naphthalenecarboxylic acid 70714-70-4 EINECS 274-801-0