SHEET /m/astatine · PubChem CID 5460479 · CAS 20601-76-7 · REV 2026.07
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Astatine
from sourceAt · 209.98715 g/mol
astato · Element-At
What is Astatine?
The rarest naturally occurring element on earth: less than a teaspoon exists in the whole crust at any moment, and every atom decays within hours. Element 85. from source
CategoryElement & material
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Fig. 1 · 2D structure RDKit
SMILES
[At]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.