Nitrous oxide is a colourless gas. It has 2 nitrogen atoms and a single oxygen atom shortened as N2O. Nitrous oxide is typically used for sedation & pain relief by medical doctors and dentists. 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 detached & helps combust the cars ordinary fuel and release more energy.
The nitrous oxide for sale here is for food and 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 uses.