[{"from": "human", "value": "Provide a brief overview of this molecule. [O-1][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[Fe+2]"}, {"from": "gpt", "value": "The molecule appears as a greenish or yellow-brown crystalline solid. Density 15.0 lb /gal. Melts at 64 \u00b0C and loses the seven waters of hydration at 90 \u00b0C. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. Used for water or sewage treatment, as a fertilizer ingredient."}]