Nitrous oxide is a colourless gas. It has 2 nitrogen atoms and 1 oxygen atom denoted as N2O. Nitrous oxide is usually used for anesthesia and pain relief by medical doctors & 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 and helps burn the cars normal fuel and release more power.
The nitrous oxide sold here is for culinary purposes. It is used as a foaming agent in food and drink, whipping cream, making mousses, infusing flavours into alcohol & many other culinary uses.