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Immediately Dangerous To Life or Health (IDLH) Values										
Alert_06
		Archived: This Page Is No Longer Being Updated
			**NOTE:** This page is archived for historical purposes and is no longer being maintained or updated.										Related Pages
										May 1994
Immediately Dangerous to Life or Health Concentrations (IDLH)
A1
confirmed human carcinogen (ACGIH)A2
suspected human carcinogen (ACGIH)A3
animal carcinogen (ACGIH)A4
not classifiable as a human carcinogen (ACGIH)A5
not suspected as a human carcinogen (ACGIH)ACGIH
American Conference of Governmental Industrial HygienistsAIHA
American Industrial Hygiene AssociationCAS
Chemical Abstract ServiceCF
correction factor for LC dataCFR
Code of Federal RegulationsEEGL
emergency exposure guidance level (NRC)ERPG
emergency response planning guideline (AIHA)IDLH
immediately dangerous to life or health concentration valuei.p.
intraperitoneali.v.
intravenouskg
kilogramLC
lethal concentrationLC50
concentration causing death in 50%LCLo
lowest concentration causing deathLD
lethal doseLD50
dosage causing death in 50%LDLo
lowest dosage causing deathLEL
lower explosive limitmg/kg
milligrams per kilogram of body weightmg/m3
milligrams per cubic meter of airmmHg
millimeters of mercury (pressure measurement)mppcf
millions of particles per cubic foot of airNIOSH
National Institute for Occupational Safety and HealthNRC
National Research CouncilOSHA
Occupational Safety and Health AdministrationPEL
permissible exposure limit (OSHA)ppm
parts per million parts of airRD50
concentration producing a 50% decrease in respiratory rate following a 10-minute exposureREL
recommended exposure limit (NIOSH)s.c.
subcutaneousSCP
Standards Completion Program (NIOSH/OSHA)SPEGL
short-term public emergency guidance level (NRC)STEL
Short-term exposure limitTCLo
lowest concentration resulting in a toxic effectTDLo
lowest dose resulting in a toxic effectTLV
threshold limit value (ACGIH)TWA
time-weighted average

			
							
								Page last reviewed:  December 4, 2014 (archived document)						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Publications & Products
Immediately Dangerous To Life or Health (IDLH) Values
Table of IDLH Values
Criteria for Determining IDLH Values
Historical Documentation
Original (SCP) Values
Abbreviations for IDLH Documentation
Abbreviations for Journal Titles Follow NIOSH Facebook
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