Your Dry Ice Safety Resource Center
Product Information: Carbon Dioxide
Carbon dioxide gas/vapor is colorless, odorless, and about 1.5 times as heavy as air, while dry ice is white/opaque. Carbon dioxide can exist simultaneously at its triple point as a solid, liquid, and gas at a temperature of –69.9 °F (–56.6 °C) and a pressure of 60.4 psig (416 kPa). At temperatures and pressures below the triple point, carbon dioxide can be either a solid (dry ice) or a gas, depending upon temperature conditions. At temperatures and pressures above the triple point and below 87.9 °F (31.1 °C), carbon dioxide liquid and gas can exist in equilibrium in a closed container.