Tehran University of Medical Sciences

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Occupational Exposure Limits Publisher



Nikfar S1 ; Mozaffari S1, 2
Authors

Source: Encyclopedia of Toxicology# Fourth Edition: Volume 1-9 Published:2023


Abstract

Occupational exposure limits (OELs) are essential regulatory instruments for health professionals to identify toxic substances and their risk in case of human exposure. The level of an OEL depends on the outcome of the risk assessment and the risk management processes for a substance. The common OEL duration categories include mean OEL, time-weighted average (TWA), threshold limit value (TLV), TLV-TWA, short-term exposure limit, ceiling limit, and derived no effect levels (DNELs). Most defined OELs are derived from adverse effects arising from occupational exposure to contaminant concentrations in the air. Skin-penetrating compounds may exert systemic toxic effects. Assessing exposure to physical agents is important for protecting worker health. © 2024 Elsevier Inc. All rights reserved.
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