[{"from": "human", "value": "What can you tell me about this molecule? [C][=C][C][=Branch1][=N][=C][Branch1][=Branch2][C][=Branch1][Branch1][=C][Ring1][=Branch1][Br][O-1][Br][O][C][=C][Branch1][S][C][=Branch1][C][=O][C][=Branch1][Branch2][=C][C][Ring1][#Branch1][=N][Ring1][P][Br][Br].[NH4+1]"}, {"from": "gpt", "value": "The molecule is a dark brown powder. Lustrous dark-violet crystalline scales. Soluble in alcohol, ether, acetone, phenol and glacial acetic acid. Used as an indicator in analytical chemistry."}]