Carbon Dioxide CO2
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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.