1-((3,4-Dichlorophenyl)azo)-2-hydroxy-3-naphthoic acid o-ethylanilide 2-Naphthalenecarboxamide, 4-((3,4-dichlorophenyl)azo)-N-(2-ethylphenyl)-3-hydroxy- 4-((3,4-Dichlorophenyl)azo)-N-(2-ethylphenyl)-3-hydroxynaphthalene-2-carboxamide 72088-86-9 EINECS 276-329-0