Florida LP Master Qualifier Practice Test

The correct name of the odorant added to propane is ethyl-mercaptan. This compound is chosen specifically for its strong and recognizable smell, which is essential for safety reasons. Propane is a colorless and odorless gas under normal conditions, and the addition of ethyl-mercaptan allows for the detection of leaks, which is vital in preventing accidents and ensuring safety in its use.

The compound has a distinctive odor, often described as resembling rotten eggs or cabbages, making it easily identifiable even in very low concentrations. This safety measure is a standard practice in the gas industry, ensuring that both residential and industrial users can quickly sense any potential leaks.

Other compounds mentioned, like propyl-mercaptan, butyl-mercaptan, and isobutyl-mercaptan, are also mercaptans but are not used as the primary odorant for propane. Their olfactory characteristics may not be as effective or recognized as ethyl-mercaptan, further solidifying ethyl-mercaptan’s unique role in propane safety.