Nitrogen is a colorless, odorless, non-toxic, almost inert gas. It is non-flammable and will not support combustion. It the most commonly used industrial gas.
Some of its uses are for flow testing, gauge calibration, plastic forming, Aerosol propellant, powering of tools, metal de-gassing, pipeline testing, pressure testing cables and the handling and transfer of flammable liquids.
To prevent the undesirable presence of Oxygen, Nitrogen is valuable in furnaces, metal plating and tinning, chemical processing, food packaging, wine making, paint and varnish manufacture, tube manufacture, packaging and preserving rubber products.