maleic acid

dicarboxylic acid
ChemicalSubstance type_of_chemical_entity Q42038
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maleic acid

Summary

maleic acid is a type of chemical entity[1]. It ranks in the top 5% of type_of_chemical_entity entities by monthly Wikipedia readership (507 views/month).[2]

Key Facts

  • maleic acid's instance of is recorded as type of chemical entity[3].
  • maleic acid's canonical SMILES is recorded as C(=CC(=O)O)C(=O)O[4].
  • maleic acid's chemical formula is recorded as C₄H₄O₄[5].
  • maleic acid is a type of dicarboxylic acid[6].
  • maleic acid is a type of fatty acid[7].
  • maleic acid's Commons category is recorded as Maleic acid[8].
  • maleic acid comprises oxygen[9].
  • maleic acid comprises carbon[10].
  • maleic acid's found in taxon is recorded as Chlamydomonas reinhardtii[11].
  • maleic acid's found in taxon is recorded as Astragalus cibarius[12].
  • maleic acid's found in taxon is recorded as Fasciola hepatica[13].
  • maleic acid's found in taxon is recorded as Prunus avium[14].
  • maleic acid's found in taxon is recorded as Arabidopsis thaliana[15].
  • maleic acid's described by source is recorded as Great Soviet Encyclopedia (1926–1947)[16].
  • maleic acid's described by source is recorded as Otto's encyclopedia[17].
  • maleic acid's described by source is recorded as Encyclopædia Britannica 11th edition[18].
  • maleic acid's NCI Thesaurus ID is recorded as C25951[19].
  • maleic acid's different from is recorded as malonic acid[20].
  • maleic acid's MCN code is recorded as 2917.19.21[21].
  • maleic acid's isomeric SMILES is recorded as OC(=O)\C=C/C(O)=O[22].
  • maleic acid's mass is recorded as {'amount': '+116.010959'}[23].
  • maleic acid's melting point is recorded as {'amount': '+130.5'}[24].
  • maleic acid's subject has role is recorded as enzyme inhibitor[25].
  • maleic acid's conjugate base is recorded as maleate(1-)[26].
  • maleic acid'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

maleic acid ranks in the top 5% of type_of_chemical_entity entities by monthly Wikipedia readership (507 views/month).[2] It has Wikipedia articles in 27 language editions, a strong signal of global cultural recognition.[28] It is known by 58 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 acid. Retrieved October 4, 2026, from https://4ort.xyz/entity/maleic-acid
MLA “maleic acid.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Oct. 2026, https://4ort.xyz/entity/maleic-acid.
BibTeX @misc{4ortxyz_maleic-acid_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{maleic acid}}, year = {2026}, url = {https://4ort.xyz/entity/maleic-acid}, note = {Accessed: 2026-10-04}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): maleic acid — https://4ort.xyz/entity/maleic-acid (retrieved 2026-10-04)

Canonical URL: https://4ort.xyz/entity/maleic-acid · 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. 10d ago · KrBot bot · 2026-09-26 view diff on Wikidata ↗
    Zvg number → 14640
    "/* wbsetclaimvalue:1| */ [[Property:P679]]: 14640, см. / see [[Template:Autofix|autofix]] на / on [[Property talk:P679]]"
  2. 13d ago · Mrwdat3 · 2026-09-23 view diff on Wikidata ↗
    Aliases → —
    Found in taxon → Chlamydomonas reinhardtii, Astragalus cibarius, Fasciola hepatica +2
    Mass → {'amount': '+116.010959'}
    Safety classification and labelling → NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response
    + 12 other properties edited (see Wikidata diff for full list)
    "/* wbcreateclaim-create:1| */ [[Property:P679]]: 014640, [[:toollabs:quickstatements/#/batch/275042|batch #275042]]"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.