Nitrous oxide is a colourless gas. It has 2 nitrogen atoms and 1 oxygen atom denoted as N2O. Nitrous oxide is typically used for sedation & pain relief by medical professionals and 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 low temperatures. However, when super heated the oxygen is detached & helps combust the cars normal petrol and release more energy.
The nitrous oxide for sale here is for culinary purposes. It can be used as a foaming agent in food and drink, whipping cream, making mousses, infusing flavours into alcohol and lots of other culinary uses.