Carbon dioxide (CO2) is a slightly toxic, odorless, colorless gas with a slightly pungent, acid taste. Carbon dioxide is a small but important constituent of air.
Carbon dioxide is used on a large scale as a shield gas in MIG/MAG welding, where the gas protects the weld puddle against oxidation by the surrounding air. It is also used in the manufacture of casting molds to enhance their hardness.
Fire Extinguishers: CO2 extinguishes fires.
Beverage: This gas is used to make carbonated beverages including beer and sparkling wine to add effervescence.
CO2 Laser: The CO2 laser, a common type of industrial gas laser uses CO2 as a medium.
Oil Wells: Carbon dioxide is commonly injected into or next to producing oil wells to draw lost traces of crude oil .
Solvent: Liquid CO2 is considered as a good dissolving agent for many organic compounds. Here it can be used to remove caffeine from coffee.
Chemical Industry: It is used as a raw material in the chemical process industry, especially for urea and methanol production.