Nitrous oxide is a colourless gas. It has 2 nitrogen atoms and a single oxygen atom denoted 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 petrol booster in cars. Nitrous oxide is not flammable at low temperatures. However, when super heated the oxygen is broken off & helps combust the cars normal fuel and release more power.
The nitrous oxide available 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 foodcooking applications.