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