Tags: Chemical Compound, Chemical Substance.
Thallium(I) carbonate (Tl2CO3) is a chemical compound. It can be used for the manufacture of imitation diamonds in chemical analysis to test for carbon disulfide and as a fungicide. Like other thallium compounds it is considered extremely toxic with an oral median lethal dose of 21 mg/kg in mice. Due to its toxicity it is listed in the United States List of Extremely Hazardous Substances as of 2007.