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Trans-1,2-diphenylethylene

Tretrachloro-o-xylene

2-Naphthol-8-sulfonic acid

4,5-Dihydroxynaphthalene-2,7-disulfonic acid, disodium salt dihydrate

Sodium 6,8-dihydroxynaphthalene-2-sulphonate

1-Acetamido-7-naphthol

8-Amino-1-naphthol-5-sulfonic acid

1-Amino-8-naphthol-2,4-disulfonic acid

2-Amino-8-naphthol-6-disulfonic acid