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Chemical substance record

Terbium

7440-27-9Tb158.925 g/mol
ElementChEBI source record

Terbium is indexed in ChEBI under CHEBI:33376, with the reported formula Tb. Use the source record and structural identifiers below to confirm the material you need. — ChEBI

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Identity & molecular properties

Source-linked values
CAS number7440-27-9ChEBI ↗
Molecular formulaTbChEBI ↗
Molar mass158.925 g/molChEBI ↗
Monoisotopic mass158.92535 DaChEBI ↗
Formal charge0ChEBI ↗
ChEBI identifierCHEBI:33376ChEBI ↗

Cross-source molecular data

PubChem
Molar mass158.92535 g/molPubChem ↗
Exact mass158.92535 DaPubChem ↗

PubChem computed values are shown separately from the ChEBI record. An exact InChIKey match was used to connect the records. Molecular descriptors do not describe a supplied product’s purity, particle size or performance.

Names & structural identifiers

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terbium atom
terbium
GZCRRIHWUXGPOV-UHFFFAOYSA-N
[Tb]
InChI=1S/Tb

Names & synonyms

terbium

Names are supplied by ChEBI. Trade names and related synonyms may describe a broader product context.

Classification & relationships

ChEBI ontology

Mass ↔ amount of substance

Calculated from sourced mass
Equivalent amount
0.00629228 mol

Uses 158.925 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Elemental composition

Theoretical mass fractions
Tb
Terbium · 1 atom
100.00%

Calculated theoretical mass fractions from the reported formula and PubChem periodic-table atomic masses. These are not assay or purity results.

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Sources & record history

Checked 27 Sep 2026
EMBL-EBI ChEBI · CHEBI:33376

Release 255, 9 September 2026. ChEBI three-star (manually annotated) source entry. View original record ↗ · CC BY 4.0

NCBI PubChem · CID 23958 · retrieved 2026-09-27

PubCAS formats source data, connects references and computes explicitly labelled conversions. CAS cross-references are supplied by ChEBI; they do not constitute CAS verification or endorsement.