May 10, 2019 · The Immediately dangerous to life or health air concentration values (IDLH values) developed by the National Institute for Occupational Safety and Health (NIOSH) characterize these high-risk exposure concentrations and conditions and are used as a component of respirator selection criteria first developed in the mid-1970s.

Until this occurs, this list contains IDLH values based on both the 1994 revised criteria and CIB 66 [NIOSH 2014-100]. It is important to note which criteria was applied to develop a specific IDLH value.

The term immediately dangerous to life or health (IDLH) is defined by the US National Institute for Occupational Safety and Health (NIOSH) as exposure to airborne contaminants that is "likely to cause death or immediate or delayed permanent adverse health effects or prevent escape from such an environment." Examples include smoke or other ...

Apr 25, 2022 · Immediately Dangerous to Life and Health limits (IDLHs) are workplace exposure limits that are meant to protect workers when they are exposed to a toxic chemical in the course of their work. What are IDLHs?

Feb 5, 2019 · An IDLH value determines the concentration at which exposure to a chemical without a respirator would cause permanent or escape-impairing health effects.

IDLH values are based on a 30-minute exposure duration and have traditionally served as a key 16 component of the decision logic for the selection of respiratory protection devices [NIOSH 2004].

In determining IDLHs, the ability of a worker to escape without loss of life or irreversible health effects was considered along with severe eye or respiratory irritation and other deleterious effects (e.g., disorientation or incoordination) that could prevent escape.

These criteria form a tiered approach with acute human toxicity data being used preferentially, followed next by acute animal inhalation toxicity data, and then finally by acute animal oral toxicity data to determine an updated IDLH value.

The revised IDLH for carbon monoxide is 1,200 ppm based on acute inhalation toxicity data in humans

Sep 2, 2019 · “Immediately Dangerous to Life or Health” (IDLH) is a term used to describe hazards in which an acute exposure to the hazard poses a severe risk of immediate health damage, injury, or death.