ethyl mercaptan

noun Chemistry.
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Science Dictionary
ethyl mercaptan  
A colorless organic liquid that has a very strong odor. It is added to odorless fuel, such as natural gas, and fuel systems as a warning agent in the event of leakage or spills. Also called ethanethiol. Chemical formula: C2H6S.
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Example sentences
Rust particles can absorb the propane odorant, ethyl mercaptan.
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