Adjective
IDLH (not comparable)
(emergency services) Initialism of immediately dangerous to life or health.
Rescues in IDLH conditions can be extremely hazardous.
Higher concentrations are especially hazardous and NIOSH has established an Immediately Dangerous to Life and Health Limit (IDLH) of 5 μmol/mol. Source: Internet
The permissible exposure limit (PEL) in the United States is 50 ppm (35 mg/m 3 ), while the IDLH concentration is estimated at 300 ppm. Source: Internet