Argon
Ar39.9 g/mol Calculated
The noble gas that fills a light bulb and shields a weld, and makes up almost one percent of the air you are breathing. Element 18.
Sources and notes
- The introductionfrom sourceMoleculeFinder curated
- Formula and weightcomputedPubChem
- 2D drawingcomputedPubChem structure, drawn by RDKit
Where you encounter it
A pure element or an engineered material, rather than an ingredient in a product.
Sources and notes
- The line abovefrom sourceMoleculeFinder curatedFrom the group the molecule belongs to.
Properties and sources
Calculated by PubChem
- Molecular formula
- Ar
- Molecular weight
- 39.9 g/mol
Reported Hazard label (GHS), ECHA via PubChem
Warning Compressed gas pictogram (GHS04); hazard statements H280, H281
Groups it belongs to
- Category
- Element & material
- Family
- Chemical elements
- Hazard classes
- Compressed gas, GHS Warning
- Size
- Under 100 g/mol
Questions
- What is Argon?
- The noble gas that fills a light bulb and shields a weld, and makes up almost one percent of the air you are breathing. Element 18.
- How toxic is Argon?
- Its GHS hazard label carries the signal word Warning and the hazard pictogram Compressed gas. from source
- What kind of molecule is Argon?
- Argon has the formula Ar and a molecular weight of 39.9 g/mol. MoleculeFinder files it under chemical elements, in the element & material group. from sourcefrom sourcefrom sourcefrom source
Sources and notes
- Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
- Hazard labelfrom sourceECHA via PubChemThe label combines these classifications.
- ECHAfrom sourceAttributionSource: European Chemicals Agency, echa.europa.eu.
- Data refreshedfrom sourceMoleculeFinder2026-11-09