Which gas smells like rotten eggs?

Hydrogen sulfide is the gas that is commonly associated with the smell of rotten eggs. This characteristic odor is primarily due to its chemical composition and low concentration, making it easily detectable by human smell receptors. Hydrogen sulfide is a colorless gas that can be produced during the decay of organic matter, as well as in various industrial processes. Its presence in environments, particularly in mining and other industrial settings, raises significant safety concerns due to its toxicity.

When safety professionals and mine foremen are trained, it is critical to recognize this odor as an indication of potential hazards, as hydrogen sulfide can pose serious health risks even at low concentrations. Identifying the smell of hydrogen sulfide early can help in implementing proper safety measures to protect workers, such as ventilation or evacuation if needed.