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Chemical substance record

Potassium(1+)

24203-36-9K39.098 g/mol

A monoatomic monocation obtained from potassium. — ChEBI

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Identity & molecular properties

Source-linked values
CAS number24203-36-9ChEBI ↗
Molecular formulaKChEBI ↗
Molar mass39.098 g/molChEBI ↗
Monoisotopic mass38.96316 DaChEBI ↗
Formal charge1ChEBI ↗
ChEBI identifierCHEBI:29103ChEBI ↗

Cross-source molecular data

PubChem
Molar mass39.0983 g/molPubChem ↗
Exact mass38.96370648 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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potassium(1+)
potassium cation
NPYPAHLBTDXSSS-UHFFFAOYSA-N
[K+]
InChI=1S/K/q+1

Names & synonyms

potassium cationpotassium(1+) ionpotassium(I) cation

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

Classification & relationships

ChEBI ontology

Roles recorded in ChEBI

cofactorhuman metabolite

Database role annotations describe reported biological or chemical roles; they are not product approvals or recommendations for use.

Mass ↔ amount of substance

Calculated from sourced mass
Equivalent amount
0.0255768 mol

Uses 39.098 g/mol from ChEBI. Assumes the substance described by this record; no purity or concentration correction is applied.

Elemental composition

Theoretical mass fractions
K
Potassium · 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:29103

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

NCBI PubChem · CID 813 · 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.