Nitrogen n2 Cas no.: 7727-37-9 Einecs no.: 231-783-9 Un no.: un1066 Dot class: 2.2 Appearance: colorless Grade standard: food grade, industrial grade, electronic grade. In various analytical instrument applications: Carrier gas for gas chromatography, support gas for electron capture detectors, liquid chromatography mass spectrometry, purge gas for inductive couple plasma. Liquid nitrogen: Like dry ice, the main use of liquid nitrogen is as a refrigerant.
