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