| Formula / Notation | Ar |
|---|---|
| CAS Number | 7440-37-1 |
| Molecular Weight | 39.95 |
| Melting Point | -189.4 |
| Boiling Point | -185.8 |
| Density | 0.00178 |
| Solubility | 69.8 mg/L at 20 C |
| Appearance | Colourless, odourless monatomic gas |
| Also Known As | Ar, argon gas |
| Category | Elements |
What is Argon?
Argon is a colourless, odourless noble gas, atomic number 18, the most abundant noble gas in Earth atmosphere (0.934%). Chemically inert with no known stable compounds. Produced by fractional distillation of liquid air.
Formula & Notation
IUPAC Name: Argon
Other Names / Synonyms: Ar, argon gas
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | -189.4 |
| Boiling Point | -185.8 |
| Density | 0.00178 |
| Molecular Weight | 39.95 |
| Solubility | 69.8 mg/L at 20 C |
| Appearance | Colourless, odourless monatomic gas |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Argon is a colourless, odourless noble gas, atomic number 18, the most abundant noble gas in Earth atmosphere (0.934%). Chemically inert with no known stable compounds. Produced by fractional distillation of liquid air.
Inert shielding gas for TIG/MIG welding. Inert atmosphere for reactive metal production. Incandescent lighting filler. Argon lasers. Double-glazing insulation. Wine preservation. Semiconductor manufacture.
Asphyxiation hazard in enclosed spaces - displaces oxygen without warning. Cryogenic liquid argon (-186 C): cold burns. Pressurised cylinders: mechanical hazard. Otherwise non-toxic.
The formula or notation for Argon is: Ar