Ntawm qhov siab ntawm 5.07 MPa (50 cua), cov pa roj carbon dioxide tuaj yeem ua rau hauv cov kua tsis muaj xim. Cov kua roj carbon dioxide muaj qhov ntom ntawm 1.101 g / cm³ ntawm -37 degree; Nws cov ntsiab lus kub yog -88.5 ± 9.0℃(ntawm 760 mmHg), thiab nws cov ntsiab lus melting yog -78.5 degree.
Thaum cov pa roj carbon dioxide yaj hauv dej, cov dej pH qis qis, uas ua rau muaj kev phom sij rau cov kab mob hauv dej.
Cov kua carbon dioxide absorbs ib qho tseem ceeb ntawm cov cua sov thaum nws evaporates; Thaum txias rau -21.1℃nyob rau hauv lub siab ntawm 0.415 MPa, kua carbon dioxide solidifies tsim cov khoom carbon dioxide, feem ntau hu ua dej khov qhuav. Raws li ib txwm muaj, carbon dioxide yog tshuaj lom neeg ruaj khov; Txawm li cas los xij, ntawm qhov kub siab, nws decomposes rau hauv carbon monoxide thiab oxygen. Thaum tam sim no nrog cov kab ntau ntawm cov dej, nws cov tshuaj aqueous nthuav tawm cov khoom acidic.
