asphyxiant
Oxygen-displacing hazard gas
An asphyxiant is a substance that causes asphyxiation—death or unconsciousness from lack of oxygen.
Some asphyxiants are toxic gases that directly interfere with breathing; others are simple asphyxiants like nitrogen or helium that displace oxygen without being poisonous themselves.
Carbon monoxide is a common household asphyxiant.
The adjective describes anything capable of causing suffocation: asphyxiant gases.
Element seven, colorless gas
- carbon dioxideRespiration byproduct, photosynthesis fuel
- methaneSimplest alkane fuel
- argonUnreactive element eighteen
- heliumLightest noble gas
propane · butane · hydrogen · neon · krypton · xenon · radon · ethane
Exposure to harm
- lethalCausing or capable of death
- fatalCausing death or ruin
- deadlyAble to cause expiration
- toxicCapable of causing harm
noxious · poison · risk · peril · warning · exposure · concentration · threshold
State of lacking necessities
- anoxiaAbsence of oxygen supply
- hypoxiaInsufficient tissue oxygenation
- displacementRemoval from usual location
- deficiencyLack of something needed
depletion · starvation · exclusion · atmosphere · partial pressure · concentration · breathing · respiration
Lacking air, gasping
- airlessHaving no atmosphere
- chokingBlocked airway condition
- smotheringDepriving of air
- gaspingBreathing in sharp gulps
respiratory failure · apnea · cyanosis · unconsciousness · dizziness · confusion · collapse · death
nitrogen
Element seven, colorless gas
- carbon dioxideRespiration byproduct, photosynthesis fuel
- methaneSimplest alkane fuel
- argonUnreactive element eighteen
helium · propane · butane · hydrogen · neon · krypton · xenon · radon · ethane · refrigerant
danger
Exposure to harm
toxic · noxious · poison · risk · peril · warning · exposure · concentration · threshold · confined space
deprivation
State of lacking necessities
- anoxiaAbsence of oxygen supply
- hypoxiaInsufficient tissue oxygenation
- displacementRemoval from usual location
deficiency · depletion · starvation · exclusion · atmosphere · partial pressure · concentration · breathing · respiration · inhalation
breathless
Lacking air, gasping
- airlessHaving no atmosphere
- chokingBlocked airway condition
- smotheringDepriving of air
gasping · respiratory failure · apnea · cyanosis · unconsciousness · dizziness · confusion · collapse · death · victim
- safety signswarning sign, warning signs, danger sign, caution sign, warning labels
asphyxiantoxygen
Element eight, colorless gas
supplemental oxygen · air · fresh air · breathable air · oxygen therapy
- positional asphyxiaSuffocation from restricted positioning
asphyxiate, asphyxia, asphyxiation, asphyxiated, asphyxiating, asphyxiates, asphyxiations