2-Naphthalenesulfonic acid, 7-((4-aminobenzoyl)amino)-4-hydroxy-3-((4-methoxyphenyl)azo)-, monosodium salt 2-Naphthalenesulfonic acid, 7-(4-aminobenzoylamino)-4-hydroxy-3-((4-methoxyphenyl)azo)-, sodium salt 67990-25-4