[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][Hg][S][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O-1].[Na+1]"}, {"from": "gpt", "value": "The molecule is an organomercury compound. This compound is a well-established and widely used antiseptic and antifungal agent.   Developed in 1927, thimerosal has been and is still being used as a preservative in some cosmetics, topical pharmaceuticals, and biological drug products, which includes vaccines. There has been significant concern regarding its safety and toxicity in the last several decades. Although thimerosal is banned in several countries, it continues to be included as a preservative in some vaccines in the United States and many vaccines in the developing world."}]