ISPE Glossary of Pharmaceutical and Biotechnology Terminology

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IDLH (Immediately Dangerous to Life and Health)

A concentration of airborne contaminants, normally expressed in parts per million (ppm) or milligrams per cubic meter, which represents the maximum level from which one could escape within 30 minutes without any escape-impairing symptoms or irreversible health effects. This level is established by the National Institute of Occupational Safety and Health (NIOSH).

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