Argon

Specification    

Purity,% 99.999 99.9999
Hydrogen ≤0.5 ppmv ≤100 ppbv
Oxygen ≤1.5 ppmv ≤200 ppbv
Nitrogen ≤ 4.0 ppmv ≤500 ppb
Carbon dioxide ≤0.5 ppmv ≤100 ppbv
Carbon monoxide ≤0.5 ppmv ≤100 ppbv
Methane ≤0.5 ppmv ≤100 ppbv
Moisture ≤3.0 ppmv ≤200 ppbv

transportation    

DOT Shipping name Argon, compressed
DOT classification 2.2
DOT label Non-flammable gas
UN.NO. UN1006
CAS No. 7440-37-1
CGA/DISS/JIS/BS341/DIN477 580/718/W22-14R/NO.3/NO.6
Transport state Compressed gas

Technical Information    

Cylinder condition @ 21.1°C gas
The combustion limit in the air is not combustible
Natural temperature (°C)-
Molecular weight (g/mol) 39.948
Specific gravity (air =1) 1.38
Critical temperature (°C) -122.29
Critical temperature (psig) 691.067

Application

1. Application in various analytical instruments; optical spectroscopy-inductively coupled plasma, graphite furnace atomic absorption, Fourier transform infrared.
2. Gas Chromatography-High-efficiency discharge detector in helium, ultrasonic detector, carrier gas when analyzing hydrogen in helium.
3. Used to fill incandescent bulbs; mixed with neon, helium and mercury vapor to fill phosphor tubes.
4. Used as a protective gas in metallurgical heat treatment, and as a carrier gas/replacement gas in the semiconductor production process.