Ethanethiol, which serves this purpose, is usually added to propane so leaks can be detected
It can serve as fuel for cooking, central heating and to water heating and is a... [DOC] [TLE] Ethanethiol - Wikipedia [PAR] Ethanethiol, commonly known as ethyl mercaptan, is a colorless gas or clear 
liquid with a ... Ethanethiol has a strongly disagreeable odor that humans can 
detect in ... the amount of ethanethiol in the gas, to make detections of leaks 
easier.