Common · Knowledge
BDTH2
Chemical compound
BDTH2 (also called BDET and BDETH2; trade names B9, MetX, and OSR#1) is an organosulfur compound that is used as a chelation agent. It is a colourless solid. The molecule consists of two thiol groups and linked via a pair of amide groups.
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The compound was reported in about 1994 after a search for chelating agents selective for mercury. It was licensed in 2006 to CTI Science with the long-term goal of using BDTH2 to treat mercury poisoning. This compound is prepared by treating isophthaloyl dichloride with two equiv of cysteamine: BDTH2 can be used to chelate heavy metals like lead, cadmium, copper, manganese, zinc, iron, and mercury from ground water, coal tailings, gold ore, waste water of battery-recycling plants, and contaminated soil. BDTH2 appears to bind mercury more strongly than do other chelators. The mercury-BDT complex does not break down even at high pH and in the presence of cyanides, as in waste water of gold mines. The particular stability of the mercury bond can be attributed to the linear position of the two thiols. The company Covalent Research Technologies had investigated BDTH2 for the removal of mercury from flue gas without success.
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