Hydrogen Sulfide

**Semantic type:** Chemical Viewed Functionally

**Definition:** A highly flammable conjugate acid of a cyanide that occurs naturally in crude petroleum, natural gas, and hot springs, and can be produced by bacterial breakdown of organic material and waste. It is used as a chemical weapon agent and is characterized as a colorless gas with a strong rotten egg odor that causes irritation of the eyes and respiratory tract, as well as toxic systemic effects.

**Synonyms:** - HYDROGEN SULFIDE