Hydrogen sulfide, commonly known as H2S, is a colorless gas with a characteristic odor of rotten eggs. It is produced naturally during the decomposition of organic matter and can also be found in volcanic gases, natural gas, and some mineral springs. H2S is highly toxic and can be harmful to human health, even at low concentrations. In industrial settings, H2S is often encountered in oil and gas extraction, sewage treatment, and paper manufacturing. Due to its toxicity, safety measures are crucial when working with or around H2S. Exposure can lead to respiratory issues, and in high concentrations, it can be fatal.