Tert-butyl mercaptan, also known as TBM or tert-butanethiol, is a sulfur containing organic compound with the chemical formula C4H10S recognized for its extremely strong and penetrating odor. This clear to light yellow liquid is widely used as an odorant in natural gas and liquefied petroleum gas systems so leaks can be detected at very low concentrations. TBM is also used as an intermediate in specialty chemical synthesis. In equipment handling TBM, O-rings, rubber seals, gaskets, and plastic components should be evaluated for chemical compatibility because sulfur compounds can affect certain rubber materials. Proper storage, ventilation, and protective handling procedures are essential to maintain safe operation.

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