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 (259 views/month).[2]

Key Facts

  • maleic acid's instance of is recorded as type of chemical entity[3].
  • maleic acid's chemical structure is recorded as Maleinsäure.svg[4].
  • maleic acid's chemical structure is recorded as Maleic acid structure.svg[5].
  • maleic acid's GND ID is recorded as 4168704-8[6].
  • maleic acid's CAS Registry Number is recorded as 110-16-7[7].
  • maleic acid's EC number is recorded as 203-742-5[8].
  • maleic acid's canonical SMILES is recorded as C(=CC(=O)O)C(=O)O[9].
  • maleic acid's InChI is recorded as InChI=1S/C4H4O4/c5-3(6)1-2-4(7)8/h1-2H,(H,5,6)(H,7,8)/b2-1-[10].
  • maleic acid's InChIKey is recorded as VZCYOOQTPOCHFL-UPHRSURJSA-N[11].
  • maleic acid's chemical formula is recorded as C₄H₄O₄[12].
  • maleic acid's subclass of is recorded as dicarboxylic acid[13].
  • maleic acid's subclass of is recorded as fatty acid[14].
  • maleic acid's Commons category is recorded as Maleic acid[15].
  • maleic acid's MeSH descriptor ID is recorded as C030272[16].
  • maleic acid's has part is recorded as oxygen[17].
  • maleic acid's has part is recorded as carbon[18].
  • maleic acid's ChEMBL ID is recorded as CHEMBL539648[19].
  • maleic acid's Guide to Pharmacology Ligand ID is recorded as 9630[20].
  • maleic acid's Freebase ID is recorded as /m/06sjl9[21].
  • maleic acid's UNII is recorded as 91XW058U2C[22].
  • maleic acid's RTECS number is recorded as OM9625000[23].
  • maleic acid's ChemSpider ID is recorded as 392248[24].
  • maleic acid's PubChem CID is recorded as 444266[25].
  • maleic acid's KEGG ID is recorded as C01384[26].
  • maleic acid's ZVG number is recorded as 14640[27].

Why It Matters

maleic acid ranks in the top 5% of type_of_chemical_entity entities by monthly Wikipedia readership (259 views/month).[2] It has Wikipedia articles in 27 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] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . Global Substance Registration System. Retrieved . wikidata.org.
  6. [8] . Global Substance Registration System. Retrieved . wikidata.org.
  7. [9] . PubChem. Retrieved . wikidata.org.
  8. [10] . PubChem. Retrieved . wikidata.org.
  9. [11] . PubChem. Retrieved . wikidata.org.
  10. [12] . PubChem. Retrieved . wikidata.org.
  11. [13] . wikidata.org.
  12. [14] . wikidata.org.
  13. [15] . wikidata.org.
  14. [16] . Medical Subject Headings. Retrieved . wikidata.org.
  15. [17] . wikidata.org.
  16. [18] . wikidata.org.
  17. [19] . ChEMBL. Retrieved . wikidata.org.
  18. [20] . IUPHAR/BPS Guide to PHARMACOLOGY. Retrieved . wikidata.org.
  19. [21] . Freebase Data Dumps. wikidata.org.
  20. [22] . Global Substance Registration System. Retrieved . wikidata.org.
  21. [23] . wikidata.org.
  22. [24] . Q2311683. Retrieved . wikidata.org.
  23. [25] . PubChem. Retrieved . 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 May 3, 2026, from https://4ort.xyz/entity/maleic-acid
MLA “maleic acid.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 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: 2026-05-03}}
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 2026-05-03)

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