Hydrogen Sulfide or sour gas (H2S) is a flammable, colorless gas that is toxic at extremely low concentrations. It is heavier than air, and may accumulate in low-lying areas. It smells like "rotten eggs" at low concentrations and causes you to quickly lose your sense of smell. Many areas where the gas is found have been identified, but pockets of the gas can occur anywhere. [More]

Iron sulfide is a byproduct of many production operations and may spontaneously combust with air.

Flaring operations associated with H2S production will generate Sulfur Dioxide (S02), another toxic gas.

Active monitoring for hydrogen sulfide gas and good planning and training programs for workers are the best ways to prevent injury and death.

  • ANSI Z390.1-2006: At the conclusion of this course the attendee should be familiar with the dangers associated with entering into and working safely in an H2S environment; and successfully complete a written evaluation of the information presented during this training session in accordance with the ANSI Z390.1-2006.