Nitrous oxide is a colourless gas. It has two nitrogen atoms & one oxygen atom written as N2O. Nitrous oxide is typically used for sedation and pain relief by medical professionals and dental professionals. It has also been misused by people for recreational reasons.
Another use for nitrous oxide gas is as a fuel booster in cars. Nitrous oxide is not flammable at lowwer temperatures. However, when super heated the oxygen is release and helps burn the cars normal petrol and release more power.
The nitrous oxide sold here is for culinary purposes. It is used as a foaming agent in food & drink, whipping cream, making mousses, infusing flavours into alcohol & lots of other culinary applications.