hydroxyl radical

radical composed by one atom of oxygen and one atom of hydrogen

Class type of: reactive oxygen species, diatomic molecule, radical Q427071

Facts

9 properties

Instance of: type of chemical entity
Follows: hydroxide ion^[2]
Subclass of: reactive oxygen species, diatomic molecule, radical^[5]^[6]^[7]
Canonical SMILES: [OH]^[3]
Chemical formula: HO^[4]
Described by source: Great Soviet Encyclopedia (1926–1947)^[8]
Different from: hydroxyl, hydroxide ion
Mass: +17.00274
Subject has role: oxidizing agent, primary metabolite

🏷️ Also known as

en hydroxyl en hydroxyl radical ar جذر الهيدروكسيل de Hydroxyradikale de OH-Radikal de Hydroxyl-Radikal de Hydroxylradikal es Radical hidroxilo fa رادیکال هیدروکسیل fr radical hydroxyle he רדיקל הידרוקסיל hu Hidroxilgyök id Radikal hidroksil it Radicale ossidrile ja OHラジカル ja ヒドロキシラジカル ja ヒドロキシルラジカル ko 하이드록실 라디칼 nl hydroxylradicaal pl rodnik hydroksylowy

🔖 Identifiers · 22

GND ID: 4191615-3
OpenAlex ID: C2776778087
CAS Registry Number: 3352-57-6
ChEBI ID: 29191
ChEMBL ID: CHEMBL1689064
ChemSpider ID: 138477
DSSTox substance ID: DTXSID901318744
Freebase ID: /m/03bx0r7
Gmelin number: 105
InChI: InChI=1S/HO/h1H
InChIKey: TUJKJAMUKRIRHC-UHFFFAOYSA-N
JSTOR topic ID (archived): hydroxyl-radicals

Show all 22 identifiers +10

KBpedia ID: HydroxideRadical
KEGG ID: C16844
MeSH descriptor ID: D017665
MeSH tree code: D01.045.250.357, D01.248.497.158.459.300, D01.339.431.249
Microsoft Academic ID (discontinued): 2776778087
PubChem CID: 157350
SureChEMBL ID: 2523
UMLS CUI: C0063146
UniChem compound ID: 1006622
Yale LUX ID: concept/6fe9cbb2-a63d-45f6-8413-522129d285a6

Report an error or request removal Lineage (PROV-JSON)

🔗 Connections

Subclass of 3

radical, diatomic molecule, reactive oxygen species

Different from 2

hydroxyl, hydroxide ion

Subject has role 2

oxidizing agent, primary metabolite

← Different from 2

hydroxyl, hydroxide ion

Follows 1

hydroxide ion

← FactGrid item ID 1

Harta

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Summary

hydroxyl radical is a type of chemical entity^[1].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

[2] ↑ hydroxyl radical — follows (P155): hydroxide ion. wikidata.org.
[3] ↑ hydroxyl radical — canonical SMILES (P233): [OH]. PubChem. Retrieved 2016-09-21. wikidata.org.
[4] ↑ hydroxyl radical — chemical formula (P274): HO. PubChem. Retrieved 2016-09-21. wikidata.org.
[5] ↑ hydroxyl radical — subclass of (P279): reactive oxygen species. wikidata.org.
[6] ↑ hydroxyl radical — subclass of (P279): diatomic molecule. wikidata.org.
[7] ↑ hydroxyl radical — subclass of (P279): radical. goldbook.iupac.org. goldbook.iupac.org. Provenance: wikidata.org.
[8] ↑ hydroxyl radical — described by source (P1343): Great Soviet Encyclopedia (1926–1947). wikidata.org.

Class ancestry

[1] ↑ hydroxyl radical is an instance of type of chemical entity (Q113145171) [P31, primary]. Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA

4ort.xyz Knowledge Graph. (2026). hydroxyl radical. Retrieved November 2, 2026, from https://4ort.xyz/entity/hydroxyl-radical

MLA “hydroxyl radical.” 4ort.xyz Knowledge Graph, 4ort.xyz, 2 Nov. 2026, https://4ort.xyz/entity/hydroxyl-radical.

BibTeX

@misc{4ortxyz_hydroxyl-radical_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{hydroxyl radical}}, year = {2026}, url = {https://4ort.xyz/entity/hydroxyl-radical}, note = {Accessed: 2026-11-02}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): hydroxyl radical — https://4ort.xyz/entity/hydroxyl-radical (retrieved 2026-11-02)

Canonical URL: https://4ort.xyz/entity/hydroxyl-radical · Last refreshed: November 2, 2026