Argon
ArCAS Number: 7440-37-1
High-purity argon, an inert noble gas used as a shielding atmosphere in MIG/TIG welding, steelmaking, and semiconductor fabrication. Also used as a carrier gas in analytical instruments (GC, ICP-MS) and in specialist lighting.
Specifications
| Chemical Formula | Ar |
| Country of Origin | Nigeria |
| Purity (per COA) | 99.997% |
| Oxygen (O₂) | < 3 ppm |
| Nitrogen (N₂) | < 10 ppm |
| Moisture (H₂O) | < 10 ppm |
| Total Hydrocarbons (THC) | < 1 ppm |
| Filled Pressure | 200 kg/cm² |
| Boiling Point | −185.9°C |
| Appearance | Colourless, odourless gas |
| Density (at STP) | 1.784 g/L |
Packaging Options
- 50kg SIGL cylinders
- High-pressure cylinders (T, K, D sizes)
- Bulk liquid dewars
Available Incoterms
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Ota, Ogun State, Nigeria
What is it used for?
Applications & Reactions
How Argon (Ar) is used across industries, with the key chemistry explained simply.
MIG / TIG Welding Shielding
Displaces reactive atmospheric oxygen and nitrogen from the weld pool. Pure argon or Ar/CO₂ blends produce spatter-free, high-quality welds on stainless steel and aluminium.
Steelmaking & Ladle Refining
Purged through molten steel in the ladle to homogenise temperature and composition, remove dissolved gases, and prevent oxidation before casting.
Semiconductor & Electronics Manufacturing
Provides an ultra-pure inert blanket atmosphere during silicon wafer processing, thin-film deposition (sputtering), and fibre-optic cable manufacturing.
Analytical Gas Chromatography
Used as an inert carrier gas in gas chromatographs and as a plasma gas in ICP-OES / ICP-MS instruments for trace elemental analysis.