ClassyFire is a web-based application for automated structural classification of chemical entities. This application uses a rule-based approach that relies on a comprehensible, comprehensive, and computable chemical taxonomy. ClassyFire provides a hierarchical chemical classification of chemical entities (mostly small molecules and short peptide sequences), as well as a structure-based textual description, based on a chemical taxonomy named ChemOnt, which covers 4825 chemical classes of organic and inorganic compounds. Moreover, ClassyFire allows for text-based search via its web interface. It can be accessed via the web interface or via the ClassyFire API.


There's a mismatch between the MIRIAM URI format string, which has a C prefix in front of class identifiers and the ontology which does not use them.

Alternative Prefixes
Homepage OBO
Missing Contact
Pattern for Local Unique Identifiers

Local identifiers in ClassyFire should match this regular expression:

Example Local Unique Identifier
0004828   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from ClassyFire should match this regular expression:

Example CURIE
Namespace Embedded in LUI
This resource has been annotated by the Bioregistry as having a potential namespace embedded in LUI. This means that you may see local unique identifiers that include a redundant prefix and delimiter (also known as a banana) and therefore look like a CURIE. For ClassyFire, the banana looks like C. Therefore, you may see local unique identifiers for this resource that look like C0004828 (instead of the canonical form 0004828) and CURIEs for this resource that look like classyfire:C0004828 (instead of the canonical form classyfire:0004828). The Bioregistry will automatically strip off the banana when standardizing local unique identifiers and CURIEs.
Metaregistry ClassyFire

The metaregistry provides mappings between the Bioregistry and other registries. There are 1 mappings to external registries for this resource with 1 unique external prefixes.

Registry Name Registry Metaprefix External Prefix Curate logo miriam classyfire

A provider turns a local unique identifiers from a resource into a URI. Many providers are also resolvable as URLs (i.e., they can be used in a web browser).

The local unique identifier 0004828 is used to demonstrate the providers available for ClassyFire. A guide for curating additional providers can be found here.

Name Metaprefix URI
ClassyFire classyfire
Bioregistry bioregistry miriam