maleic anhydride

the acid anhydride of maleic acid
ChemicalSubstance type_of_chemical_entity Q412377
Press Enter · cited answer in seconds

maleic anhydride

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 (366 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 {'unit': 'Q13147228', 'amount': '+1.48'}[16].
  • maleic anhydride's density is recorded as {'unit': 'Q13147228', 'amount': '+1.314'}[17].
  • maleic anhydride's mass is recorded as {'unit': 'Q483261', 'amount': '+98'}[18].
  • maleic anhydride's melting point is recorded as {'unit': 'Q42289', 'amount': '+127'}[19].
  • maleic anhydride's melting point is recorded as {'unit': 'Q25267', 'amount': '+54'}[20].
  • maleic anhydride's melting point is recorded as {'unit': 'Q25267', 'amount': '+52.56'}[21].
  • maleic anhydride's melting point is recorded as {'unit': 'Q25267', 'amount': '+52.8'}[22].
  • maleic anhydride's boiling point is recorded as {'unit': 'Q42289', 'amount': '+396'}[23].
  • maleic anhydride's boiling point is recorded as {'unit': 'Q25267', 'amount': '+202'}[24].
  • maleic anhydride's vapor pressure is recorded as {'unit': 'Q6859652', 'amount': '+0.2'}[25].
  • maleic anhydride's vapor pressure is recorded as {'unit': 'Q5139563', 'amount': '+1.33'}[26].
  • maleic anhydride's vapor pressure is recorded as {'unit': 'Q21064807', 'amount': '+1'}[27].

Why It Matters

maleic anhydride ranks in the top 5% of type_of_chemical_entity entities by monthly Wikipedia readership (366 views/month).[2] It has Wikipedia articles in 23 language editions, a strong signal of global cultural recognition.[28] It is known by 33 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] . 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] . Comparison of different extraction methods: steam distillation, simultaneous distillation and extraction and headspace co-distillation, used for the analysis of the volatile components in aged flue-cured tobacco leaves. wikidata.org.
  9. [11] . Comparative study of the leaf volatiles of Arctostaphylos uva-ursi (L.) Spreng. and Vaccinium vitis-idaea L. (Ericaceae).. wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  12. [14] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  13. [15] . wikidata.org.
  14. [16] . GESTIS database. Retrieved . cdc.gov. Provenance: wikidata.org.
  15. [17] . CRC Handbook of Chemistry and Physics (97th edition). wikidata.org.
  16. [18] . PubChem. Retrieved . wikidata.org.
  17. [19] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  18. [20] . Jean-Claude Bradley Open Melting Point Dataset. wikidata.org.
  19. [21] . CRC Handbook of Chemistry and Physics (97th edition). wikidata.org.
  20. [22] . Basic laboratory and industrial chemicals: A CRC quick reference handbook. wikidata.org.
  21. [23] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  22. [24] . CRC Handbook of Chemistry and Physics (97th edition). Retrieved . wikidata.org.
  23. [25] . cdc.gov. cdc.gov. Provenance: wikidata.org.
  24. [26] . GESTIS database. Retrieved . wikidata.org.
  25. [27] . CRC Handbook of Chemistry and Physics (97th edition). 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 May 3, 2026, from https://4ort.xyz/entity/maleic-anhydride
MLA “maleic anhydride.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 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: 2026-05-03}}
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 2026-05-03)

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. 11d ago · Twofivesixbot bot · 2026-05-25 view diff on Wikidata ↗
    Boiling point {'unit': 'Q42289', 'amount': '+396'}, {'unit': 'Q25267', 'amount': '+202'}
    Subclass of carboxylic anhydride
    Lower flammable limit {'unit': 'Q2080811', 'amount': '+1.4'}
    Ionization energy {'unit': 'Q83327', 'amount': '+9.9'}, {'unit': 'Q83327', '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.