Helium atom

HeCAS 7440-59-74.00 g/mol

Open in Covalent MOL file

Properties

Molecular formula: He
Molar mass: 4.00 g/mol
Exact mass: 4.0026 Da
Density: 3.13 g/mL
Melting point: −272.2 °C
Boiling point: −268.9 °C
Water solubility: 2.5 mg/L (21 °C)
logP: 0.00Crippen estimate
Polar surface area: 0.0 Å²
H-bond donors / acceptors: 0 / 0
Rotatable bonds: 0

Hazards

Warning

H280 Contains gas under pressure; may explode if heated65.6% of notifiers
H281 Contains refrigerated gas; may cause cryogenic burns or injury35.4% of notifiers

Aggregated from 491 ECHA notifications, via PubChem; a share says how many notifiers assign that statement.

Precautionary statements

P282, P336+P317, P403, P410+P403

Identifiers

CAS number

7440-59-7

SMILES

[He]

InChIKey

SWQJXJOGLNCZEY-UHFFFAOYSA-N

InChI

InChI=1S/He

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Type any one amount. The others follow from the molar mass and density.

Names and synonyms

5 names

Helium
Helium-4
o-Helium
p-Helium
Atomic helium

Work with Helium atom

Predict the NMR spectrum1H and 13C shifts with multiplicities Make a solutionWhat to weigh for any molarity and volume Check drug-likenessLipinski, Veber and lead-likeness Boiling point under vacuumAt any pressure, from its normal boiling point Isotope patternExact mass and the mass spectrum pattern

Elsewhere

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