maleic anhydride

the acid anhydride of maleic acid
ChemicalSubstance type_of_chemical_entity Q412377
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Summary

maleic anhydride is a type of chemical entity[1]. It ranks in the top 5% of type_of_chemical_entity entities by monthly Wikipedia readership (25 views/month).[2]

Key Facts

  • maleic anhydride's instance of is recorded as type of chemical entity[3].
  • maleic anhydride's canonical SMILES is recorded as C1=CC(=O)OC1=O[4].
  • maleic anhydride's chemical formula is recorded as C₄H₂O₃[5].
  • maleic anhydride is a type of carboxylic anhydride[6].
  • maleic anhydride's Commons category is recorded as Maleic anhydride[7].
  • maleic anhydride comprises oxygen[8].
  • maleic anhydride comprises carbon[9].
  • maleic anhydride's found in taxon is recorded as Nicotiana tabacum[10].
  • maleic anhydride's found in taxon is recorded as Arctostaphylos uva-ursi[11].
  • maleic anhydride's described by source is recorded as Great Soviet Encyclopedia (1926–1947)[12].
  • maleic anhydride's has effect is recorded as maleic anhydride exposure[13].
  • maleic anhydride's has characteristic is recorded as flammable solid[14].
  • maleic anhydride's NIOSH Pocket Guide ID is recorded as 0376[15].
  • maleic anhydride's density is recorded as {'amount': '+1.48'}[16].
  • maleic anhydride's density is recorded as {'amount': '+1.314'}[17].
  • maleic anhydride's mass is recorded as {'amount': '+98'}[18].
  • maleic anhydride's melting point is recorded as {'amount': '+127'}[19].
  • maleic anhydride's melting point is recorded as {'amount': '+54'}[20].
  • maleic anhydride's melting point is recorded as {'amount': '+52.56'}[21].
  • maleic anhydride's melting point is recorded as {'amount': '+52.8'}[22].
  • maleic anhydride's boiling point is recorded as {'amount': '+396'}[23].
  • maleic anhydride's boiling point is recorded as {'amount': '+202'}[24].
  • maleic anhydride's vapor pressure is recorded as {'amount': '+0.2'}[25].
  • maleic anhydride's vapor pressure is recorded as {'amount': '+1.33'}[26].
  • maleic anhydride's vapor pressure is recorded as {'amount': '+1'}[27].

Why It Matters

maleic anhydride ranks in the top 5% of type_of_chemical_entity entities by monthly Wikipedia readership (25 views/month).[2] It has Wikipedia articles in 23 language editions, a strong signal of global cultural recognition.[28] It is known by 57 alternative names across languages and contexts.[29]

References

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

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . wikidata.org.
  25. [27] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [28] ↑ . Wikidata sitelinks. wikidata.org.
  3. [29] ↑ . 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). maleic anhydride. Retrieved October 13, 2026, from https://4ort.xyz/entity/maleic-anhydride
MLA “maleic anhydride.” 4ort.xyz Knowledge Graph, 4ort.xyz, 13 Oct. 2026, https://4ort.xyz/entity/maleic-anhydride.
BibTeX @misc{4ortxyz_maleic-anhydride_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{maleic anhydride}}, year = {2026}, url = {https://4ort.xyz/entity/maleic-anhydride}, note = {Accessed: 2026-10-13}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): maleic anhydride — https://4ort.xyz/entity/maleic-anhydride (retrieved 2026-10-13)

Canonical URL: https://4ort.xyz/entity/maleic-anhydride · 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. 19d ago · KrBot bot · 2026-09-26 view diff on Wikidata ↗
    Zvg number → 17110
    "/* wbsetclaimvalue:1| */ Zvg number: 17110, см. / see [[Template:Autofix|autofix]] на / on [[Property talk:P679]]"
  2. 22d ago · Mrwdat3 · 2026-09-23 view diff on Wikidata ↗
    Zvg number → 17110
    "/* wbcreateclaim-create:1| */ Zvg number: 017110, [[:toollabs:quickstatements/#/batch/275042|batch #275042]]"
  3. 13w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 2qriM1, 2zUTRt
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  4. 20w ago · Twofivesixbot bot · 2026-05-25 view diff on Wikidata ↗
    Boiling point → {'amount': '+396'}, {'amount': '+202'}
    Subclass of → carboxylic anhydride
    Lower flammable limit → {'amount': '+1.4'}
    Ionization energy → {'amount': '+9.9'}, {'amount': '+10.80'}
    + 22 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-statements-multiple-properties-update:0||2 */ mv to monolingual text names on J9U statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.