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www.cdc.gov

Carbon Monoxide (CO) Poisoning Fact Sheet

Carbon monoxide (CO) is an odorless, colorless gas that kills without warning. It claims the lives of hundreds of people every year and makes thousands more ill.

en.wikipedia.org

CO - Wikipedia

Chemistry Carbon monoxide (CO), a colorless, odorless, and tasteless gas Carbonyl group, composed of a carbon atom double-bonded to an oxygen atom: C=O Cobalt, a chemical element, symbol Co