Nitrogen (N2) is a colorless, ordorless, nonflammable or a colorless, odorless, nonflammable cryogenic gas. Airgas offers unique BIP ® technology in argon, helium and nitrogen. BIP technology (an Air Products innovation) provides premium-grade purity at costs you would expect to pay for zero-grade gas using a purifier built into the cylinder.
More Resources: BIP Technology, Cylinder Comparison, Nitrogen Resource Guide