What is Hydrogen Sulphide ?

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Hydrogen sulfide may be a safety issue for workers in a number of industries, including oil and gas refining, mining, tanning, pulp and paper processing, and rayon manufacturing. It also occurs in sewers, manure pits, water wells, oil and gas wells and volcanoes.

Hydrogen sulfide is produced by the reaction of hydrogen and sulfur. This gas is heavier than air, so it tends to collect in low-lying places, making work in enclosed spaces where hydrogen sulfide may be present very dangerous.

Depending on the concentration of exposure, the health effects of exposure to hydrogen sulfide can range from headaches and eye irritation to unconsciousness and death.

Hydrogen sulfide is a flammable, poisonous gas with a characteristic odor of rotten eggs. It is used in the manufacture of chemicals, in metallurgy, and as an analytical reagent.

Hydrogen sulfide is a highly toxic and flammable gas. Because it is heavier than air it tends to accumulate at the bottom of poorly ventilated spaces. Although very pungent at first, it quickly deadens the sense of smell, so potential victims may be unaware of its presence until it is too late.

Hydrogen sulfide (H2S) occurs naturally in crude petroleum, natural gas, volcanic gases, and hot springs. It can also result from bacterial breakdown of organic matter. It is also produced by human and animal wastes.

Toxic and flammable gas with an obnoxious odor, formed during decomposition of organic (animal and plant) matter, but generated largely by oil burning and refining processes. It smells like rotten eggs, irritates eyes, and when inhaled in low concentrations, irritates respiratory tract. Higher concentrations can cause breathing difficulty, nausea, vomiting, and even death.

Hydrogen sulfide is a colorless, flammable, extremely hazardous gas with a “rotten egg” smell. It occurs naturally in crude petroleum and natural gas, and can be produced by the breakdown of organic matter and human/ animal wastes (e.g., sewage). It is heavier than air and can collect in low-lying and enclosed, poorly ventilated areas such as basements, manholes, sewer lines and underground telephone/electrical vaults.

Hydrogen sulfide is a highly toxic and flammable gas. Because it is heavier than air it tends to accumulate at the bottom of poorly ventilated spaces.

Hydrogen sulfide (H2S) is a colorless gas known for its "rotten egg" smell. It is extremely flammable and highly toxic.

Hydrogen sulfide may be a safety issue for workers in a number of industries, including oil and gas refining, mining, tanning, pulp and paper processing, and rayon manufacturing.

Hydrogen sulfide may be a safety issue for workers in a number of industries, including oil and gas refining, mining, tanning, pulp and paper processing, and rayon manufacturing. It also occurs in sewers, manure pits, water wells, oil and gas wells and volcanoes.

Hydrogen sulfide is also known as sewer gas, swamp gas, stink gas and sour damp.

Hydrogen sulfide is produced by the reaction of hydrogen and sulfur. This gas is heavier than air, so it tends to collect in low-lying places, making work in enclosed spaces where hydrogen sulfide may be present very dangerous

Toxic and flammable gas with an obnoxious odor, formed during decomposition of organic (animal and plant) matter, but generated largely by oil burning and refining processes.

It smells like rotten eggs, irritates eyes, and when inhaled in low concentrations, irritates respiratory tract. Higher concentrations can cause breathing difficulty, nausea, vomiting, and even death.

Hydrogen sulfide is a highly toxic and flammable gas. Because it is heavier than air it tends to accumulate at the bottom of poorly ventilated spaces. Although very pungent at first, it quickly deadens the sense of smell, so potential victims may be unaware of its presence until it is too late.

H2S arises from virtually anywhere where elemental sulfur comes into contact with organic material, especially at high temperatures. Hydrogen sulfide is a covalent hydride chemically related to water (H2O) since oxygen and sulfur occur in the same periodic table group.

It often results when bacteria break down organic matter in the absence of oxygen, such as in swamps, and sewers (alongside the process of anaerobic digestion).

It also occurs in volcanic gases, natural gas and some well waters. It is also important to note that Hydrogen sulfide is a central participant in the sulfur cycle, the biogeochemical cycle of sulfur on Earth.

As mentioned above, sulfur-reducing and sulfate-reducing bacteria derive energy from oxidizing hydrogen or organic molecules in the absence of oxygen by reducing sulfur or sulfate to hydrogen sulfide.

Hydrogen sulfide gas causes a wide range of health effects. Workers are primarily exposed to hydrogen sulfide by breathing it. The effects depend on how much hydrogen sulfide you breathe and for how long. Exposure to very high concentrations can quickly lead to death.

Other bacteria liberate hydrogen sulfide from sulfur-containing amino acids. Several groups of bacteria can use hydrogen sulfide as fuel, oxidizing it to elemental sulfur or to sulfate by using oxygen or nitrate as oxidant.