Nitrous oxide is a colourless gas. It has two nitrogen atoms and a single oxygen atom written as N2O. Nitrous oxide is commonly used for anesthesia & pain relief by medical professionals & dentists. It has also been misused by people for recreational purposes.
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 ordinary fuel and release more power.
The nitrous oxide available here is for food & drink uses. It is used as a foaming agent in food and drink, whipping cream, making mousses, infusing flavours into alcohol & lots of other culinary applications.