The "Star trek" canon concordance
Other: Gases
- See also Medical
- Acid dichloride: Paris, Tom: Warp 10 DNA rewrite: (Essential) - Specifications: Toxic: (Humans)
- Anestascene:
- DS9: Terrorists flood with concentrate to kill crew
- Humanoids: Inhalation fatal
- Specifications: Colourless, Odourless
- Argon: Liquid: (Ahmedeen Sea) - Vapour: Caretaker's Array: Remains
- Argonite: DS9: (Seeping into air supply)
- Carbon dioxide: Poisoning: Treatment: Tri-ox compound
- Deuterium: Batris Main Engineering - Ignition: (Phasers)
- Fluorine: Betamite planetoid: SurroundsDelta Flyer - Specifications: Toxic: (Humanoids)
- Helium: Vapour: Caretaker's Array: Remains
- Hydrogen:
- Calendenium: Explosive: USS Enterprise-D and ship free selves from Tychon Rift
- Liquid: Relva VII: Environmental Maintenance Laboratory: Starfleet: Academy entrance exam
- Vapour: Caretaker's Array: Remains
- Interstellar: Data: Creates defence against Picard Manoeuvre
- Ionised: Chamra Vortex: Occludes sensors - Hydrogen cloud: Inhibits sensors
- Mercury: Vapour: Caretaker's Array: Remains
- Methane: Corn silo: Explosion: Klaang fires disruptor - Sigma 3 Colony: (Explosion)
- Metreon: Son'a battleship: Explodes - USS Voyager: Disables impulse and warp engines; Ignition: Phasers
- Nebular:
- Ionised; Delta Flyer 2: Absorbs warp core breach
- Nebula Being: Attacks: Janeway, Kathryn, Neelix and Tuvok - Traps Seven of Nine
- Neurocene: Cardassian Union: Security systems - Specifications: Toxic: (Non-Cardassians)
- Neurozine: Damar: (Knocks out Dominion fighter crew) - EMH and EMH {Prometheus}: Retake USS Prometheus
- Nitrogen tetroxide: Tierna: Shuttle atmosphere
- Oxygen:
- Asteroid Talaxians: (Melt asteroid's surface layer of ice)
- Monean extraction plant: Paris, Tom and Riga: Threaten
- Tri-ox compound: Carbon dioxide poisoning: Treatment; Low oxygen level: Compensates
- USS Voyager: Bridge: Depletion: Nebula Being
- Tridium: DS9: Traces power drain - Specifications: Toxic: Humanoids
- Trigemic vapour: Humanoids: Dermal irritation - Reptiloids: Breathe
- Unspecified:
- Jeraddo: (Energy mining releases) - Specifications: Toxic: Bajorans
- Mordock: Breathing apparatus
- Volcanic: Cosla II: Specifications: Toxic
