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