Helium
CAS Registry Number®
7440-59-7
CAS Name
HeliumMolecular Formula
HeMolecular Mass
4.00Cite this Page
Helium. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. http://commonchemistry.cas.org/detail?cas_rn=7440-59-7 (retrieved ) (CAS RN: 7440-59-7). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).Compound Properties
Boiling Point (1)
-268.9 °CMelting Point (2)
-272.2 °CDensity (3)
0.01498 g/cm³ @ Temp: 500 °C; Press: 1.1 x 10⁵ Torr
Source(s)
- (1) Hazardous Substances Data Bank data were obtained from the National Library of Medicine (US)
- (2) International Chemical Safety Cards data were obtained from the National Institute for Occupational Safety and Health (US)
- (3) Vutukuru, Ravindra; Applied Thermal Engineering, (2019), 159, 113973, CAplus
Other Names and Identifiers
InChI
InChI=1S/He
InChIKey
InChIKey=SWQJXJOGLNCZEY-UHFFFAOYSA-N
SMILES
[He]
Canonical SMILES
[He]
Other Names for this Substance
- Helium
- Helium-4
- o-Helium
- p-Helium
- Atomic helium
Deleted or Replaced CAS Registry Numbers
494798-31-1, 1312815-28-3
