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Hydrogen sulfide is a chemical compound with the formula H 2 S. It is a colorless chalcogen-hydride gas, and is poisonous, corrosive, and flammable, with trace amounts in ambient atmosphere having a characteristic foul odor of rotten eggs.
Learn about the hazards, health effects, and prevention of hydrogen sulfide exposure in the workplace. Find out where hydrogen sulfide is used or produced, and how to evaluate and control your exposure.
Learn about the health and safety effects of hydrogen sulfide, a flammable, explosive gas with a rotten egg smell. Find out the exposure limits, symptoms, first aid, and resources for workers and employers.
Concentration (ppm)Symptoms/effects0.00011-0.00033Typical background concentrations0.01-1.5Odor threshold (when rotten egg smell is ...2-5Prolonged exposure may cause nausea, ...20Possible fatigue, loss of appetite, ...Learn about the hazards, exposure, and control of hydrogen sulfide, a colorless gas with a strong odor of rotten eggs. Find NIOSH resources, publications, and international links on hydrogen sulfide.
Learn about hydrogen sulfide, a poisonous gas formed by sulfur and hydrogen, and its properties, uses, and hazards. Find out how it is related to mine gas, biogenic gas, and hydride sulfide.
- The Editors of Encyclopaedia Britannica
Hydrogen sulfide is a colorless, flammable gas under normal conditions. It is commonly known as hydrosulfuric acid, stink damp, and sewer gas. Hydrogen sulfide smells like rotten eggs.
Hydrogen sulfide is a flammable, colorless gas that smells like rotten eggs. People usually can smell hydrogen sulfide at low concentrations in air ranging from 0.0005 to 0.3 parts per million (ppm). Hydrogen sulfide occurs naturally in crude petroleum, natural gas, volcanic gases, and hot springs.
