Is it legal to buy and import N2O to Norway?
Yes it is legal to buy and import lystgass in Norway. There are no restrictions if its for your own private catering use or business purposes. On the other side its not legal to sell and market the use of N2O for recreational use (just like any other product). There are no restrictions when buying from outside of Norway like this webshop.
We send packages with N2O to Norway every single day and we haven't had any problems with customs or anything.