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Argon - ( Ar )
Argon is a colorless, odorless, nontoxic, nonflammable gas that is heavier than air. It is shipped in steel cylinders under high pressure.
| Specifications | ||
| 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 |
| Water | ≤3.0 ppmv | ≤200 ppbv |
| Ship | ||
| DOT Shipping Name | Argon Compressed | |
| DOT Classification | 2.2 | |
| DOT Label | Non-flammable Gas | |
| UN Number | UN1006 | |
| CAS No. | 7440-37-1 | |
| CGA/DISS/JIS/BS341/DIN477 | 580/718/W22-14R/NO.3/NO.6 | |
| Shipped as | Compressed Gas | |
| Technical Information | ||
| Cylinder State @ 21.1°C | Gas | |
| Flammable Limits In Air | Non-flammable | |
| Auto Ignition Temperature (°C ) | - | |
| Molecular Weight (g/mol) | 39.948 | |
| Specific gravity (air =1) | 1.38 | |
| Critical Temperature ( °C ) | -122.29 | |
| Critical Pressure ( psig ) | 691.067 | |
| Applications | ||
| · In various analytical instrument applications; Optical Spectrometry - Inductive Coupled Plasma, Graphite Furnace Atomic Absorption, Fourier Transform Infrared · Gas Chromatography - High Efficiency Discharge Detector, Ultrasonic detector, carrier gas when analyzing hydrogen in helium · To fill incandescent light bulbs, phosphorescent tubes in mixtures with neon, helium and mercury vapour · In metallurgy for heat treatment in a protective atmosphere. Used in semiconductor manufacturing processes as a carrier/purge gas. | ||