NCIt 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.;
Alternative definition : CDISC: The chemical agent hydrogen sulfide.;