[{"from": "human", "value": "Provide a description of this molecule. [C][C][=C][C][=Branch2][Ring2][=C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][=N][C][=C][C][=C][C][=Branch2][Ring1][Branch1][=C][C][Ring1][=Branch1][=C][C][=Branch1][Branch1][=C][Ring1][#Branch2][O][S][=Branch1][C][=O][=Branch1][C][=O][O-1][S][=Branch1][C][=O][=Branch1][C][=O][O-1][C].[Na+1].[Na+1]"}, {"from": "gpt", "value": "The molecule is an organic sodium salt that is the disodium salt of 4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,7-disulfonic acid. Its use is largely confined to Masson's trichrome, where it gives a slight orange shading to the red of the cytoplasmic structures. It has a role as a histological dye, a cardiotoxic agent and a carcinogenic agent. It contains a 4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,7-disulfonate."}]