Used as an odorant in natural gas and liquefied petroleum gas (LPG) due to its strong, unpleasant smell reminiscent of rotten eggs or garlic. It helps detect gas leaks quickly, enhancing safety in domestic and industrial settings. Its volatility and persistence in the air make it effective even at low concentrations. It is stable in gas pipelines and does not easily react with other materials, making it popular in many countries. Also used in some chemical synthesis processes as an intermediate.