Carbon dioxide co2 Cas no.: 124-38-9 Einecs no.: 204-696-9 Un no.: un1013 Purity: 99.99%-99.999% Dot class: 2.2 Appearance: colorless, non-flammable, liquefied and odorless gas. Grade standard: food grade, industrial grade, medical grade. Food use: Carbon dioxide could be injected in the soda water and beers drinks to make bubbles inside. Also could be used for make wine. Fire extinguisher: Carbon dioxide extinguisher would be liquefied. Then after spray, there would not be any solid residues. Industrial laser source: Carbon dioxide laser is widely used in the world. Stage use: Dry ice could be used on increase stage performances effect.