Reference data and database search

PubChem

Search chemical structures, identifiers, properties and contributed annotations.

Platform-independentWeb applicationFree web service

Overview

PubChem integrates substance submissions, standardized compound records and bioassay information. It is useful for identifier reconciliation and candidate-reference lookup.

What can this tool do?

Structure-database searching

Common uses

  • Resolve compound identifiers and synonyms.
  • Retrieve candidate structures for an annotation workflow.

Scientific fit

Primary function

Reference data and database search

Data compatibility

Inputs

Compound list or annotations, Molecular structures

Outputs

Compound list or annotations, Molecular structures

Input formats

Other, Names, identifiers or structures

Output formats

SDF, JSON

Scope and considerations

Designed for

  • Resolve compound identifiers and synonyms.

Not designed for

  • Demonstrating that a compound is present in a biological sample.

Important requirements

  • A chemical name, identifier, structure or supported search query.

Considerations

  • Check stereochemistry, charge and salt forms when matching records; contributed annotations retain source-specific evidence.

Access and documentation

Public NIH resource; attribution and reuse terms can vary across contributing data sources.

Evidence and review

Documentation-based editorial review on 7 September 2026. Scope and limitations summarize the linked official sources; software execution and developer verification were not assessed.

Core publications

Resource papers, direct updates and tool-specific methods. Selection policy.

  1. Kim S, Chen J, Cheng T, et al. PubChem 2025 update. Nucleic Acids Res 53, D1516-D1525 (2025). doi:10.1093/nar/gkae1059

Related tools

Entry history

Changes to this catalogue entry, not the tool's software release history. Acceptance and editorial review are separate.

  1. 2026-09-08 · Entry update

    Audit core publications across existing tools

    View change · Entry at this revision
  2. 2026-09-07 · First committed entry

    Add 50 documented metabolomics resources

    View change · Entry at this revision

Full GitHub history