2-Naphthalenesulfonic acid, 6,7-dihydroxy-, sodium salt (1:1)
2-Naphthalenesulfonic acid, 6,7-dihydroxy-, monosodium salt
Sodium 2,3-dihydroxynaphthalene-6-sulfonate
2,3-Dihydroxynaphthalene-6-sodium sulfonate
6,7-Dihydroxy-2-naphthalenesulfonic acid sodium salt
Coupler 111
Coupler 517