SHEET /m/osmium · PubChem CID 23937 · CAS 7440-04-2 · REV 2026.07
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Osmium
from sourceOs · 190.2 g/mol
What is Osmium?
The densest naturally occurring element, twice as heavy as lead by volume, used in fountain pen nibs and electrical contacts. Element 76. from source
CategoryElement & material
LeaderboardsBiggest
Fig. 1 · 2D structure RDKit
SMILES
[Os]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
DangerFlammableCorrosiveIrritantH228, H315, H318, H335, H413from source