"Air" - Includes List of Ingredients
Everyone calls this stuff "canned air," but that's not what it is. Sure it's canned, but it isn't air. Air, which is what we breathe, is a natural gas whose composition falls within a narrow range, at least on Earth. You can see he average composition at the bottom of the page.
A can of this stuff is actually filled with a substance called difluoroethane, which is an inert gas in the fluorocarbon family. Fluorocarbons are far more compressible than plain air, which is whhh they're often used as propellants and dusters instead of little pieces of the atmosphere.

A can of this stuff is actually filled with a substance called difluoroethane, which is an inert gas in the fluorocarbon family. Fluorocarbons are far more compressible than plain air, which is whhh they're often used as propellants and dusters instead of little pieces of the atmosphere.