Constitutes 78% of the atmospheric air which we breathe. Nitrogen is used as a gas for its inertness and a liquid for cooling, freezing, and preservation. It is colorless and tasteless, not flammable. Characteristics Inert gas , non-flammable causes suffocation when it replaces air in a closed area .Compressed at high pressure. Grade Industrial grade: 99.5%Min High Purity: 99.995% Min Ultra-High Purity: 99.999% Min Typical Applications As the blanketing atmosphere in the refinery. For purging and testing of pipelines . For freezing of perishable food