Immediately dangerous to life or health

The words immediately dangerous to life or health or IDLH mean that chemicals in the air could be high enough to be bad for a person's health. The high amount of chemicals in the air could cause quick injury or death. The amount in the United States is set by NIOSH and OSHA. Many equations are used to find the "lethal dose", which is also called "LD". NIOSH then publishes the numbers that show how much of a chemical is bad.^[1][2]

IDLH numbers have been used to help people choose the right respirator.^[2]

Related pages

• NIOSH
• OSHA

References

1. "Immediately Dangerous To Life or Health (IDLH) Values". CDC NIOSH. Retrieved 2025-01-25.
2. Ludwig, Howard R.; Cairelli, Susan G.; Whalen, John J. (May 1994). "Documentation for Immediately Dangerous to Life or Health Concentrations (IDLHs)" (PDF). CDC NIOSH.

Other websites

• https://www.cdc.gov/niosh/idlh/
• http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=12716 1910.134(b)

Related media at Wikimedia Commons:

• Documentation for Immediately Dangerous to Life or Health Concentrations (IDLHs) (1994)