ketene

chemical compound
ChemicalSubstance type_of_chemical_entity Q421032
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ketene

Summary

ketene is a type of chemical entity[1]. ketene has Wikipedia articles in 19 language editions, a strong signal of global cultural recognition.[2]

Key Facts

  • ketene's instance of is recorded as type of chemical entity[3].
  • ketene's canonical SMILES is recorded as C=C=O[4].
  • ketene's chemical formula is recorded as C₂H₂O[5].
  • ketene is a type of ketene[6].
  • ketene's Commons category is recorded as Ethenone[7].
  • ketene comprises oxygen[8].
  • ketene comprises carbon[9].
  • ketene comprises hydrogen[10].
  • ketene's has effect is recorded as ketene exposure[11].
  • ketene's has characteristic is recorded as flammable gas[12].
  • ketene's different from is recorded as ketene[13].
  • ketene's NIOSH Pocket Guide ID is recorded as 0367[14].
  • ketene's mass is recorded as {'unit': 'Q483261', 'amount': '+42.011'}[15].
  • ketene's mass is recorded as {'unit': 'Q483261', 'amount': '+42.010564684'}[16].
  • ketene's melting point is recorded as {'unit': 'Q42289', 'amount': '-238'}[17].
  • ketene's melting point is recorded as {'unit': 'Q25267', 'amount': '-151'}[18].
  • ketene's boiling point is recorded as {'unit': 'Q42289', 'amount': '-69'}[19].
  • ketene's boiling point is recorded as {'unit': 'Q25267', 'amount': '-49.81'}[20].
  • ketene's vapor pressure is recorded as {'unit': 'Q177974', 'amount': '+1'}[21].
  • ketene's immediately dangerous to life or health is recorded as {'unit': 'Q21077820', 'amount': '+8.6'}[22].
  • ketene's electric dipole moment is recorded as {'unit': 'Q40603', 'amount': '+1.422'}[23].
  • ketene's ionization energy is recorded as {'unit': 'Q83327', 'amount': '+9.61'}[24].
  • ketene's time-weighted average exposure limit is recorded as {'unit': 'Q21077820', 'amount': '+0.9'}[25].
  • ketene's short-term exposure limit is recorded as {'unit': 'Q21077820', 'amount': '+3'}[26].
  • ketene's safety classification and labelling is recorded as NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response[27].

Why It Matters

ketene has Wikipedia articles in 19 language editions, a strong signal of global cultural recognition.[2] ketene is known by 14 alternative names across languages and contexts.[28]

References

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

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . PubChem. Retrieved . wikidata.org.
  3. [5] . PubChem. Retrieved . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  10. [12] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  11. [13] . wikidata.org.
  12. [14] . wikidata.org.
  13. [15] . PubChem. Retrieved . wikidata.org.
  14. [16] . wikidata.org.
  15. [17] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  16. [18] . Basic laboratory and industrial chemicals: A CRC quick reference handbook. wikidata.org.
  17. [19] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  18. [20] . Basic laboratory and industrial chemicals: A CRC quick reference handbook. wikidata.org.
  19. [21] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  20. [22] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  21. [23] . Basic laboratory and industrial chemicals: A CRC quick reference handbook. wikidata.org.
  22. [24] . Basic laboratory and industrial chemicals: A CRC quick reference handbook. cdc.gov. Provenance: wikidata.org.
  23. [25] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  24. [26] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  25. [27] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikidata sitelinks. wikidata.org.
  2. [28] . Wikidata aliases. 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). ketene. Retrieved May 3, 2026, from https://4ort.xyz/entity/ketene-q421032
MLA “ketene.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/ketene-q421032.
BibTeX @misc{4ortxyz_ketene-q421032_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{ketene}}, year = {2026}, url = {https://4ort.xyz/entity/ketene-q421032}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): ketene — https://4ort.xyz/entity/ketene-q421032 (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/ketene-q421032 · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 12d ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 ['2b4ROF', '4KqxJ5']
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
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