Hydrogen sulfide

Hydrogen sulfide (or hydrogen sulphide) is the chemical compound with the formula H₂S. It is a colorless, very poisonous, flammable gas with the characteristic foul odor of rotten eggs. It often results from the

IUPAC name[hide] Hydrogen sulfide, sulfane
other names[hide] Sulfuretted (or sulfureted) hydrogen; sulfurated hydrogen; sulfane; sulfur hydride; dihydrogen sulfide; dihydrogen monosulfide; hydrosulfuric acid; sewer gas; stink damp; rotten egg gas

bacterial breakdown of organic matter in the absence of oxygen, such as in swamps and sewers (anaerobic digestion). It also occurs in volcanic gases, natural gas, and some well waters. The body produces small amounts of H₂S and uses it as a signaling molecule.

Hydrogen sulfide has numerous names, some of which are archaic