Which odorant is commonly added to propane to help detect leaks?

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Multiple Choice

Which odorant is commonly added to propane to help detect leaks?

Odorization of propane is all about creating a smell that reliably signals a leak at very low concentrations. The substance used for this purpose is ethyl mercaptan, a sulfur-containing compound that has a sharp, distinctive odor—think a strong rotten-egg-like scent. This odorant is chosen because it remains detectable in the gas at tiny amounts, so people can notice a leak long before it reaches an flammable or dangerous concentration. It’s safe to handle at the small ppm levels used for odorization and it doesn’t mask other important safety cues. The other substances listed don’t serve this safety role. Methanol, ethylene glycol, and N-butanol are industrial solvents or antifreeze components with different chemical properties and toxicity concerns, and they do not provide the reliable, easily recognizable odor required to detect leaks quickly. Ethyl mercaptan’s combination of strong odor and stability in propane makes it the standard choice for leak detection.

Odorization of propane is all about creating a smell that reliably signals a leak at very low concentrations. The substance used for this purpose is ethyl mercaptan, a sulfur-containing compound that has a sharp, distinctive odor—think a strong rotten-egg-like scent. This odorant is chosen because it remains detectable in the gas at tiny amounts, so people can notice a leak long before it reaches an flammable or dangerous concentration. It’s safe to handle at the small ppm levels used for odorization and it doesn’t mask other important safety cues.

The other substances listed don’t serve this safety role. Methanol, ethylene glycol, and N-butanol are industrial solvents or antifreeze components with different chemical properties and toxicity concerns, and they do not provide the reliable, easily recognizable odor required to detect leaks quickly. Ethyl mercaptan’s combination of strong odor and stability in propane makes it the standard choice for leak detection.

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