where is selling hexane packed in nitrogen?

Answer 1

I don't know why you would need hexane under nitrogen, because as soon as you open the container, it's going to start dissolving atmospheric oxygen. Typically, only chemicals which are air- or moisture-sensitive are packed under nitrogen. Hexane is neither - it is relatively stable.

But if you require hexane in an inert (i.e., oxygen-free) environment, you are better off purchasing your hexane in bulk, then distilling it into sealable vessels, then degassing it on a high-vacuum line, back-filling it with nitrogen, and then bringing it into your inert environment.

If you haven't got the equipment, visit the nearest university chemistry department, there ought to be someone who can help you.

Answer 2

Try Aldrich. http://www.sigmaaldrich.com/Local/SA_Splash.html
I have seen it sold neat in ampules or over sieves, but not nitrogen.