Nitrogen gaseous zero brand A

Requirements to physical and chemical indicators

Name of an indicator	Norm on TU
Volume share of nitrogen, % not less	99,999
Volume share of oxygen, % no more	0,0005
Volume share of hydrogen, % no more	0,0002
Volume share of carbon dioxide, % no more	0,0002
Volume share of carbon oxide, % no more	0,00008
Volume share of methane, % no more	0,0005
Volume share of water vapor, % no more	0,0007