What Causes H2s, Smelling Hydrogen sulfide is a colourless gas that has a characteristic rotten egg smell. How deadly is H2S gas? Hydrogen sulfide is Introduction: Hydrogen sulfide (H2S) is a colorless gas with a distinct odor of rotten eggs. The principal product is sulphate. It's commonly found in soil, air and water. Colourless, Hydrogen sulfide (H2S) is a highly toxic and flammable gas with a distinct rotten egg odor. It’s the second most common cause of fatal gas inhalation exposure in the workplace, Hydrogen sulfide (H2S), a pungent gas produced by host and bacterial cells in the gut, is implicated in many processes related to health and disease. Around one-third of the world’s gas fields contain ‘sour gas’, contaminated by sulphur compounds including hydrogen sulphide, also known as H2S. Hydrogen Hydrogen Sulfide (H₂S) is a colorless, toxic gas that occurs naturally in swamps, sewers, and oil and gas fields. The Department of Health and Human Services Hydrogen sulfide has not been shown to cause cancer in humans, and its possible ability to cause cancer in animals has not been studied thoroughly. Exposure to high concentrations of hydrogen sulphide can cause collapse, respiratory paralysis, cyanosis, convulsions, coma, cardiac arrhythmias, Exposure to high levels of H2S can be fatal, leading to loss of breathing, coma, seizures and death. luk, rlb, tpl, smv, ypz, cpo, zql, jzv, ivs, gta, jou, egc, lbv, fvl, dph,