Nitrous oxide is a colourless gas. It has dual nitrogen atoms and one oxygen atom written as N2O. Nitrous oxide is typically used for sedation & 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 broken off and 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 & drink, whipping cream, making mousses, infusing flavours into alcohol and lots of other culinary applications.