I-Carbon dioxide ( ifomula yamakhemikhali Template:CO2</br> Template:CO2 ) yigesi engenambala engenambala ene-density ecishe ibe ngama-53% ngaphezulu kunaleyo yomoya owomile.Carbon dioxide molecule kuqukathe carbon athomu covalently double eziboshiwe ezimbili -mpilo ama-athomu.Kwenzeka ngokwemvelo emkhathini womhlaba njenge- trace gas . Ukuhlushwa kwamanje kungu-0.04% (412 ppm ) ngevolumu, njengoba isikhuphukile kusuka emazingeni angaphambi kwezimboni angama-280 i-ppm. Imithombo yemvelo zihlanganisa izintaba-mlilo, iziphethu ezishisayo futhi iziphethu, futhi ebugqilini amatshe carbonate ngu nokonakala emanzini futhi acid. Ngoba i-carbon dioxide iyancibilika emanzini, ivela ngokwemvelo emanzini angaphansi komhlaba, imifula namachibi, izingqimba zeqhwa, izinguzunga zeqhwa nasemanzini olwandle.Itholakala ekufakeni i- petroleum negesi yemvelo.I-Carbon dioxide inephunga elibukhali neline-asidi futhi ikhiqiza ukunambitheka kwamanzi e-soda emlonyeni. Kodwa-ke, ekugxileni okuhlangana nakho ngokuvamile akunaphunga. ICarbon dioxide kwakuyigesi yokuqala echazwa njengezinto ezihlukile.Cishe ngo-1640, we lase wemithi Jan Baptist van Helmont yaphawula ukuthi lapho wazishisa namalahle esitsheni evaliwe, nenqwaba umphumela umlotha yayiningi kunalawo namalahle yasekuqaleni.Incazelo yakhe yayiwukuthi wonke amalahle ayedluliselwe entweni engabonakali ayibiza ngokuthi "igesi" noma "umoya wasendle" (i- spiritus sylvestris ).   Ukulinganisa kwe-molecule ye-carbon dioxide kuqondile kanye ne-centrosymmetric ku-geometry yayo yokulingana.