Asphyxiant | AIChE


A vapor or gas which can cause unconsciousness or death by suffocation (lack of oxygen). Most simple asphyxiants are harmful to the body only when they become so concentrated that they reduce oxygen in the air (normally about 21%) to dangerous levels (19.5% or lower). Importance: Asphyxiation is one of the principal potential hazards of working in confined spaces.

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