squaric acid

chemical compound
ChemicalSubstance type_of_chemical_entity Q903298
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squaric acid

Summary

squaric acid is a type of chemical entity[1]. It ranks in the top 6% of type_of_chemical_entity entities by monthly Wikipedia readership (68 views/month).[2]

Key Facts

  • squaric acid's instance of is recorded as type of chemical entity[3].
  • squaric acid's chemical structure is recorded as Squaric acid.svg[4].
  • square is named after squaric acid[5].
  • squaric acid's followed by is recorded as croconic acid[6].
  • squaric acid's GND ID is recorded as 4176567-9[7].
  • squaric acid's CAS Registry Number is recorded as 2892-51-5[8].
  • squaric acid's EC number is recorded as 220-761-4[9].
  • squaric acid's canonical SMILES is recorded as C1(=C(C(=O)C1=O)O)O[10].
  • squaric acid's InChI is recorded as InChI=1S/C4H2O4/c5-1-2(6)4(8)3(1)7/h5-6H[11].
  • squaric acid's InChIKey is recorded as PWEBUXCTKOWPCW-UHFFFAOYSA-N[12].
  • squaric acid's chemical formula is recorded as C₄H₂O₄[13].
  • squaric acid's subclass of is recorded as cyclic compound[14].
  • squaric acid's subclass of is recorded as diprotic acid[15].
  • squaric acid's subclass of is recorded as organic acid[16].
  • squaric acid's subclass of is recorded as vinylogue[17].
  • squaric acid's Commons category is recorded as Squaric acid[18].
  • squaric acid's has part is recorded as carbon[19].
  • squaric acid's has part is recorded as oxygen[20].
  • squaric acid's has part is recorded as hydrogen[21].
  • squaric acid's Freebase ID is recorded as /m/07g6wb[22].
  • squaric acid's UNII is recorded as SVR9D0VODW[23].
  • squaric acid's RTECS number is recorded as GU1800000[24].
  • squaric acid's ChemSpider ID is recorded as 16919[25].
  • squaric acid's PubChem CID is recorded as 17913[26].
  • squaric acid's ChEBI ID is recorded as 52141[27].

Why It Matters

squaric acid ranks in the top 6% of type_of_chemical_entity entities by monthly Wikipedia readership (68 views/month).[2] It has Wikipedia articles in 12 language editions, a strong signal of global cultural recognition.[28] It is known by 15 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] . Elsevier's dictionary of chemoetymology: The Whys and Whences of Chemical Nomenclature and Terminology. wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . ChEBI. Retrieved . commonchemistry.cas.org. Provenance: wikidata.org.
  7. [9] . Global Substance Registration System. Retrieved . wikidata.org.
  8. [10] . PubChem. Retrieved . wikidata.org.
  9. [11] . PubChem. Retrieved . wikidata.org.
  10. [12] . PubChem. Retrieved . wikidata.org.
  11. [13] . PubChem. Retrieved . 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] . Freebase Data Dumps. wikidata.org.
  21. [23] . Global Substance Registration System. Retrieved . wikidata.org.
  22. [24] . wikidata.org.
  23. [25] . Q2311683. Retrieved . wikidata.org.
  24. [26] . PubChem. Retrieved . wikidata.org.
  25. [27] . ChEBI. Retrieved . 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). squaric acid. Retrieved May 3, 2026, from https://4ort.xyz/entity/squaric-acid
MLA “squaric acid.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/squaric-acid.
BibTeX @misc{4ortxyz_squaric-acid_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{squaric acid}}, year = {2026}, url = {https://4ort.xyz/entity/squaric-acid}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): squaric acid — https://4ort.xyz/entity/squaric-acid (retrieved 2026-05-03)

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