Argon

CAS Registry Number®

7440-37-1

CAS Name

Argon

Molecular Formula

Ar

Molecular Mass

39.95

Cite this Page

Argon.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=7440-37-1 (retrieved 2025-07-04) (CAS RN: 7440-37-1).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    -185.9 °C

  • Melting Point (1)

    -189.2 °C

  • Density (2)

    1.4 g/cm³

Source(s)

Other Names and Identifiers

InChI

InChI=1S/Ar

InChIKey

InChIKey=XKRFYHLGVUSROY-UHFFFAOYSA-N

SMILES

[Ar]

Canonical SMILES

[Ar]

Other Names for this Substance

  • Argon
  • Argon-40
  • Argon, isotope of mass 40
  • R 740
  • Khladon R 740

View All

Deleted or Replaced CAS Registry Numbers

137736-93-7, 13473-05-7, 24494-51-7, 50938-66-4, 75714-55-5, 239084-98-1, 245503-61-1

CAS INSIGHTSTM
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