Freshline® Nitrogen, Food grade is fully compliant with local and European standards. Nitrogen is an inert gas used alone or as part of a gas mixture for the modified atmosphere packaging of food. It is used to exclude air and, in particular, oxidative oxygen. It is also used as a balance gas (filler gas) to make up the difference in a gas mixture, to prevent the collapse of packs. (mixing system often required). Supplied in a 20 litre steel cylinder at 200 bar.