Nitrous oxide is a colourless gas. It has 2 nitrogen atoms & a single oxygen atom denoted as N2O. Nitrous oxide is typically used for anesthesia and pain relief by medical doctors & 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 lowwer temperatures. However, when super heated the oxygen is release and helps burn the cars usual petrol and release more energy.
The nitrous oxide sold here is for food & drink uses. It is used as a foaming agent in food & drink, whipping cream, making mousses, infusing flavours into alcohol and lots of other culinary uses.