[{"from": "human", "value": "What can you tell me about this molecule? [C][C][=C][Branch2][Ring1][P][C][=Branch1][C][=O][N][Branch1][Ring2][N][Ring1][=Branch1][C][=C][C][=Branch1][P][=C][Branch1][=Branch1][C][=C][Ring1][=Branch1][Cl][S][=Branch1][C][=O][=Branch1][C][=O][O-1][Cl][N][=N][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[Na+1].[Na+1]"}, {"from": "gpt", "value": "The molecule is an organic sodium salt that is the disodium salt of 2,5-dichloro-4-{5-hydroxy-3-methyl-4-[(4-sulfophenyl)diazenyl]pyrazol-1-yl}benzene-1-sulfonic acid. It is used as the erythrocyte stain in Garvey's method for elastic, fibrin and collagen as well as a substitute for martius yellow in Lendrum's MSB. It has a role as a histological dye, a food colouring and an allergen. It contains a lissamine fast yellow(2-)."}]