Argon
CAS 7440-37-1
EC 231-147-0
Formula Ar
MW 39.95 g/mol
Salts & Minerals Home Care & Industrial CleaningElectronicsAutomotiveAerospace & Defense Solvent & Carrier
Description
Argon (CAS 7440-37-1, EC 231-147-0, formula Ar) is a noble gas also referenced under the trade designations R 740 and argongas. It carries no assigned E-code and belongs to the inert gas group, meaning it does not react chemically under standard industrial conditions.
In electronics manufacturing, argon is used as a blanket gas during semiconductor fabrication to prevent oxidation of sensitive materials at high temperatures. In welding and metal fabrication, it shields the arc zone from atmospheric nitrogen and oxygen, preserving weld integrity. Automotive and aerospace coating processes rely on argon to maintain inert atmospheres during surface treatment.
Argon is supplied in compressed gas cylinders and bulk liquid dewars across industrial, technical, and high-purity grades, with specifications aligned to REACH registration requirements. Procurement teams should confirm purity grade against process requirements, as electronics and aerospace applications typically demand higher-specification material than general industrial use.
In electronics manufacturing, argon is used as a blanket gas during semiconductor fabrication to prevent oxidation of sensitive materials at high temperatures. In welding and metal fabrication, it shields the arc zone from atmospheric nitrogen and oxygen, preserving weld integrity. Automotive and aerospace coating processes rely on argon to maintain inert atmospheres during surface treatment.
Argon is supplied in compressed gas cylinders and bulk liquid dewars across industrial, technical, and high-purity grades, with specifications aligned to REACH registration requirements. Procurement teams should confirm purity grade against process requirements, as electronics and aerospace applications typically demand higher-specification material than general industrial use.
Physical Properties
| Melting Point | -189.2 °C |
| Boiling Point | -185.9 °C |
| Density | 1.6228 x 10⁻³ g/cm³ (gas) |
| Appearance | With the symbol A, argon is a nonflammable gas; one of the elements in the inert gas category. It is colorless. |
| Color | colorless |
| Form | colorless gas |
| Water Solubility | 33.6mL/1000g H2O (20°C) [KIR78]; Henry’s law constants, k×10?4: 3.974 (25.0°C), 5.359 (65.1°C), 5.342 (91.1°C), 3.812 (222.7°C), 2.541 (267.3°C), 1.870 (287.9°C) [POT78] |
| Log P | 0.740 (est) |
Trade & Regulatory
| UN Number | 1006 |
| ADR Class | 2.2 |
Other Names
element 1840Ar18ArR 740argon(0)argongasArgon-40argon atomargonliquid
Related Products
Raw Materials
Need a chemical? Get a quote within 24 hours.