Nitrous oxide is a colourless gas. It has 2 nitrogen atoms & one oxygen atom written as N2O. Nitrous oxide is usually used for anesthesia & pain relief by medical doctors & dental professionals. 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 cooler temperatures. However, when super heated the oxygen is broken off and helps combust the cars usual fuel and release more energy.
The nitrous oxide sold on this site 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 foodcooking uses.