Odor Thresholds, TLVs, OELs, IDLHs, and Respirator Selection Guide for Chemicals

3M Corporation put together a respiratory protection guide (download link at end of this article) that contains a wealth of information for OH&S professionals including:

Immediately Dangerous to Life or Health (IDLH) levels Odor Thresholds Occupational Exposure Levels (OELs) Respiratory Protection Selection Guide

IDLH’s are published by NIOSH and “refers to the acute respiratory exposure […]