Nitrous oxide is a colourless gas. It has 2 nitrogen atoms & a single oxygen atom denoted as N2O. Nitrous oxide is commonly used for anesthesia and pain relief by medical professionals and dentists. 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 cooler temperatures. However, when super heated the oxygen is broken off & helps combust the cars ordinary petrol and release more energy.
The nitrous oxide sold here is for food & drink purposes. It is used as a foaming agent in food & drink, whipping cream, making mousses, infusing flavours into alcohol & many other culinary applications.