Hydrogen sulfide (H2S)

Hydrogen sulfide (H₂S) is a colorless, naturally occurring gas known for its distinctive rotten egg smell. It is produced by the decay of organic matter and is found in volcanic gases, natural hot springs, and certain underground deposits. While small amounts are harmless, H₂S can be very toxic at higher concentrations, posing health risks such as respiratory issues and irritation. It is also flammable and explosive in certain conditions. Because of these hazards, proper detection and management are essential in industries like wastewater treatment, petroleum refining, and natural gas production.