SHEET /m/helium · PubChem CID 23987 · CAS 7440-59-7 · REV 2026.07
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Helium
from sourceHe · 4.0026 g/mol
What is Helium?
The second most abundant element in the universe and the reason balloons rise. It is the only substance that will not freeze at ordinary pressure however cold it gets. Element 2. from source
CategoryElement & material
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Fig. 1 · 2D structure RDKit
SMILES
[He]Where you'll find it
A pure element or an engineered material, rather than an ingredient in a product. See the rest of the element & material group.
Toxicity & hazards
WarningCompressed gasH280, H281from source