Nitrous oxide is a colourless gas. It has 2 nitrogen atoms and a single oxygen atom written as N2O. Nitrous oxide is commonly used for sedation & pain relief by medical professionals & dental professionals. 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 release and helps combust the cars usual petrol and release more power.
The nitrous oxide sold here is for culinary uses. It can be used as a foaming agent in food and drink, whipping cream, making mousses, infusing flavours into alcohol & many other culinary applications.