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The 55 pages that link to Carbon monoxide, each with the reason it gives.

• Carbon dioxideCompared with: It differs from CO₂ by one oxygen atom and has very different toxicity and chemistry.

• CombustionRelated: Incomplete combustion can produce this dangerous pollutant.

• Molecular cloudRelated: Its emission lines provide a practical tracer of molecular cloud structure.

• Molecular orbital theoryBroader topic: Its heteronuclear orbitals help explain its bond strength and unusual donor–acceptor chemistry.

• Molecular orbitalBroader topic: Its orbital energies and occupancies help explain its bond strength and coordination chemistry.

• Formal chargeBroader topic: Its common Lewis structure assigns a negative formal charge to carbon and a positive one to oxygen.

• Indoor air qualityBroader topic: Faulty or poorly vented combustion appliances can create a serious indoor poisoning hazard.

• Nitric oxideCompared with: Both are small gaseous signaling or toxic molecules, but their biological chemistry differs sharply.

• Valence bond theoryBroader topic: Its multiple bonding and alternative electronic structures illustrate resonance descriptions.

• Blast furnaceRelated: Rising carbon monoxide reduces iron oxides as the charge descends.

• Hydrogen cyanideCompared with: Both can cause fatal cellular oxygen deprivation, but through distinct mechanisms.

• Tobacco smokingRelated: Smoke inhalation exposes smokers to carbon monoxide, stressing the cardiovascular system.

• 21-centimeter lineCompared with: Its rotational lines reveal molecular clouds that the atomic-hydrogen line does not directly map.

• Catalytic converterRelated: The converter oxidizes this toxic exhaust pollutant into carbon dioxide.

• Nitrogen dioxideCompared with: Both can arise from combustion, but CO primarily causes harm by disrupting oxygen transport in blood.

• Coke (fuel)Related: Coke-derived carbon monoxide removes oxygen from iron ore in the furnace.

• BloomeryRelated: It carries out much of the oxygen removal in a charcoal-fired bloomery.

• Formic acidRelated: Industrial formic acid can be produced by reacting carbon monoxide with methanol-derived intermediates.

• SmeltingRelated: In a blast furnace, it removes oxygen from iron oxides.

• Tropospheric ozoneCompared with: It is a combustion pollutant and ozone precursor, but unlike ozone it is emitted directly.

• HydroformylationRelated: Its carbon atom becomes the additional carbon in the aldehyde product.

• Iron smeltingRelated: It carries much of charcoal’s reducing power into the furnace charge.

• Pig ironRelated: It removes oxygen from iron ore during blast-furnace smelting.

• Dimethyl etherRelated: Poorly mixed or oxygen-limited dimethyl ether combustion can still generate this pollutant.

• Comet nucleusRelated: Its ice is highly volatile and can drive activity far from the Sun.

• Diatomic moleculeBroader topic: CO exemplifies a heteronuclear diatomic molecule with a strong, polar bond.

• IronmakingRelated: It is the principal gas that converts iron oxides into metallic iron in a blast furnace.

• Nitric oxide synthaseCompared with: Like nitric oxide, it can signal through heme proteins, but it is not a nitric oxide synthase product.

• PhosgeneCompared with: Its formula resembles phosgene’s carbon–oxygen core, but its toxic mechanism and composition differ.

• Tobacco smokeRelated: It is a gaseous smoke constituent that reduces blood oxygen delivery by binding hemoglobin.

• Vehicle emissionsBroader topic: It is a major toxic component of exhaust from gasoline engines.

• Atmosphere of PlutoRelated: Its small atmospheric abundance was measured alongside nitrogen and methane.

• Metal carbonylNarrower topic: It is the ligand whose binding defines a metal carbonyl.

• Water–gas shift reactionRelated: It is the carbon-containing reactant and a contaminant removed by the shift reaction.

• Glycolic acidRelated: Carbon monoxide is a feedstock in industrial routes to glycolic acid.

• Law of multiple proportionsBroader topic: Compared with carbon dioxide, it demonstrates a one-to-two oxygen mass ratio for fixed carbon.

• Blood agentRelated: It is a familiar toxicant that demonstrates the oxygen-binding mechanism associated with blood agents.

• CigaretteBroader topic: Incomplete burning in a cigarette produces carbon monoxide, which enters the bloodstream with inhaled smoke.

• 2I/BorisovRelated: Its abundance in Borisov’s coma was unusually high compared with many Solar System comets.

• Inorganic compoundBroader topic: It is another simple carbon-containing compound placed in inorganic chemistry.

• Kennicutt–Schmidt lawRelated: CO observations provide a common, indirect estimate of the molecular surface density.

• Methyl formateRelated: Carbon monoxide reacts with methanol to produce methyl formate in an industrial route.

• Rotational–vibrational spectroscopyBroader topic: Its simple rovibrational spectrum is a standard test of diatomic molecular models.

• SyngasRelated: It supplies carbon for many syngas-based chemical syntheses.

• BiliverdinRelated: Heme cleavage releases carbon monoxide alongside biliverdin.

• Copper(I) chlorideRelated: CuCl absorbs carbon monoxide by forming copper(I) carbonyl complexes.

• Interstellar cloudRelated: Its radio emission provides a practical way to estimate molecular cloud locations and masses.

• Interstellar iceBroader topic: CO often forms a substantial, volatile layer in cold interstellar mantles.

• John Scott HaldaneRelated: Haldane’s research established its toxic action and informed exposure limits.

• Carbon suboxideCompared with: Its simple one-carbon structure contrasts with carbon suboxide’s extended cumulated chain.