CO2 below 30.98 degree centigrade exits as
At temperatures between –56.6 and +31.1°C, and pressures of at least 5.2 bar, CO2 can exist in liquid form. Liquid CO2 cannot exist at atmospheric pressure (1 bar). At temperatures below –56.6°C, CO2 can occur in the solid state. Without pressure, CO2 will exist in gas form.