Which gas is known for having a rotten egg odor?

Hydrogen Sulfide (H2S) is known for its distinctive rotten egg odor, which is a key characteristic that can help identify its presence in the environment. This gas is particularly dangerous due to its toxicity and the fact that at higher concentrations, it can lead to loss of smell, making it even more hazardous as individuals may not detect its presence before experiencing severe effects. Understanding the odor associated with Hydrogen Sulfide is crucial in safety protocols, especially in mining and industrial environments where this gas may be encountered.

In contrast, Carbon Monoxide is odorless and can be quite lethal without being detected by smell. Ammonia has a sharp, pungent odor but does not resemble that of rotten eggs, and Methane is typically odorless as well unless odorants are added for leak detection purposes. Recognizing Hydrogen Sulfide by its distinctive odor is an important safety measure in areas where this gas may be released, allowing for timely evacuation and protective actions.