phenolphthaleina

coloured pH indicator used at high pH
ChemicalSubstance type_of_chemical_entity Q187921
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phenolphthaleina

Summary

phenolphthaleina is a type of chemical entity[1]. phenolphthaleina ranks in the top 3% of type_of_chemical_entity entities by monthly Wikipedia readership (498 views/month).[2]

Key Facts

  • phenolphthaleina's image is recorded as Sample of solid phenolphthalein.jpg[3].
  • phenolphthaleina's instance of is recorded as type of chemical entity[4].
  • phenolphthaleina's chemical structure is recorded as Phenolphthalein2.svg[5].
  • phenolphthaleina's CAS Registry Number is recorded as 77-09-8[6].
  • phenolphthaleina's EC number is recorded as 201-004-7[7].
  • phenolphthaleina's canonical SMILES is recorded as C1=CC=C2C(=C1)C(=O)OC2(C3=CC=C(C=C3)O)C4=CC=C(C=C4)O[8].
  • phenolphthaleina's InChI is recorded as InChI=1S/C20H14O4/c21-15-9-5-13(6-10-15)20(14-7-11-16(22)12-8-14)18-4-2-1-3-17(18)19(23)24-20/h1-12,21-22H[9].
  • phenolphthaleina's InChIKey is recorded as KJFMBFZCATUALV-UHFFFAOYSA-N[10].
  • phenolphthaleina's Library of Congress authority ID is recorded as sh85100674[11].
  • phenolphthaleina's ATC code is recorded as A06AB04[12].
  • phenolphthaleina's chemical formula is recorded as C₂₀H₁₄O₄[13].
  • phenolphthaleina's subclass of is recorded as biogenic isobenzofuran[14].
  • phenolphthaleina's subclass of is recorded as bisphenol[15].
  • phenolphthaleina's has use is recorded as medication[16].
  • phenolphthaleina's has use is recorded as indicators and reagents[17].
  • phenolphthaleina's Commons category is recorded as Phenolphthalein[18].
  • phenolphthaleina's color is recorded as white[19].
  • phenolphthaleina's MeSH descriptor ID is recorded as D020113[20].
  • phenolphthaleina's BNCF Thesaurus ID is recorded as 33743[21].
  • phenolphthaleina's has part is recorded as carbon[22].
  • phenolphthaleina's ChEMBL ID is recorded as CHEMBL63857[23].
  • phenolphthaleina's Freebase ID is recorded as /m/01km9r[24].
  • phenolphthaleina's UNII is recorded as 6QK969R2IF[25].
  • phenolphthaleina's ChemSpider ID is recorded as 4600[26].
  • phenolphthaleina's PubChem CID is recorded as 4764[27].

Why It Matters

phenolphthaleina ranks in the top 3% of type_of_chemical_entity entities by monthly Wikipedia readership (498 views/month).[2] phenolphthaleina has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[28] phenolphthaleina is known by 44 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] . Global Substance Registration System. Retrieved . commonchemistry.cas.org. Provenance: wikidata.org.
  5. [7] . Global Substance Registration System. Retrieved . wikidata.org.
  6. [8] . PubChem. Retrieved . wikidata.org.
  7. [9] . PubChem. Retrieved . wikidata.org.
  8. [10] . PubChem. Retrieved . wikidata.org.
  9. [11] . Nuovo soggettario. Retrieved . thes.bncf.firenze.sbn.it. Provenance: wikidata.org.
  10. [12] . DrugBank. wikidata.org.
  11. [13] . PubChem. Retrieved . wikidata.org.
  12. [14] . wikidata.org.
  13. [15] . S20 | BISPHENOLS | Bisphenols. wikidata.org.
  14. [16] . DrugBank. wikidata.org.
  15. [17] . Medical Subject Headings. Retrieved . wikidata.org.
  16. [18] . wikidata.org.
  17. [19] . safety data sheet. Retrieved . pentachemicals.eu. Provenance: wikidata.org.
  18. [20] . wikidata.org.
  19. [21] . Nuovo soggettario. wikidata.org.
  20. [22] . wikidata.org.
  21. [23] . ChEMBL. Retrieved . wikidata.org.
  22. [24] . Freebase Data Dumps. wikidata.org.
  23. [25] . Global Substance Registration System. Retrieved . wikidata.org.
  24. [26] . Q2311683. Retrieved . wikidata.org.
  25. [27] . PubChem. 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). phenolphthaleina. Retrieved May 3, 2026, from https://4ort.xyz/entity/phenolphthaleina
MLA “phenolphthaleina.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/phenolphthaleina.
BibTeX @misc{4ortxyz_phenolphthaleina_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{phenolphthaleina}}, year = {2026}, url = {https://4ort.xyz/entity/phenolphthaleina}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): phenolphthaleina — https://4ort.xyz/entity/phenolphthaleina (retrieved 2026-05-03)

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