Liquid carbon dioxide is the liquid state of carbon dioxide (CO2), which cannot occur under atmospheric pressure. It can only exist at a pressure above 5.1 atm (5.2 bar; 75 psi), under 31.1 °C (88.0 °F) (temperature of critical point) and above −56.6 °C (−69.9 °F) (temperature of triple point).[1] Low-temperature carbon dioxide is commercially used in its solid form, commonly known as "dry ice". Solid CO2 sublimes at 194.65 K (−78.5 °C; −109.3 °F) at Earth atmospheric pressure — that is, it transitions directly from solid to gas without an intermediate liquid stage. The uses and applications of liquid carbon dioxide include decaffeinating coffee,[2] extracting virgin olive oil from olive paste, in fire extinguishers, and as a coolant.