Nitrous oxide is a colourless gas. It has dual nitrogen atoms & one oxygen atom written as N2O. Nitrous oxide is commonly used for sedation & pain relief by medical professionals & 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 cooler temperatures. However, when super heated the oxygen is detached and helps combust the cars ordinary petrol and release more energy.
The nitrous oxide available here is for culinary purposes. It is utilised as a foaming agent in food & drink, whipping cream, making mousses, infusing flavours into alcohol & lots of other culinary applications.