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3,4-dihydroxybenzoic acid

chemical compound
ChemicalSubstance type_of_chemical_entity Q418599
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3,4-dihydroxybenzoic acid

Summary

3,4-dihydroxybenzoic acid is a type of chemical entity[1]. It ranks in the top 6% of type_of_chemical_entity entities by monthly Wikipedia readership (80 views/month).[2]

Key Facts

  • 3,4-dihydroxybenzoic acid's image is recorded as 3,4-Dihydroxybenzoic acid.jpg[3].
  • 3,4-dihydroxybenzoic acid's instance of is recorded as type of chemical entity[4].
  • 3,4-dihydroxybenzoic acid's chemical structure is recorded as Protocatechusäure.svg[5].
  • 3,4-dihydroxybenzoic acid's physically interacts with is recorded as taste receptor type 2[6].
  • 3,4-dihydroxybenzoic acid's CAS Registry Number is recorded as 99-50-3[7].
  • 3,4-dihydroxybenzoic acid's EC number is recorded as 202-760-0[8].
  • 3,4-dihydroxybenzoic acid's canonical SMILES is recorded as C1=CC(=C(C=C1C(=O)O)O)O[9].
  • 3,4-dihydroxybenzoic acid's canonical SMILES is recorded as c1cc(c(cc1C(=O)O)O)O[10].
  • 3,4-dihydroxybenzoic acid's InChI is recorded as InChI=1S/C7H6O4/c8-5-2-1-4(7(10)11)3-6(5)9/h1-3,8-9H,(H,10,11)[11].
  • 3,4-dihydroxybenzoic acid's InChIKey is recorded as YQUVCSBJEUQKSH-UHFFFAOYSA-N[12].
  • 3,4-dihydroxybenzoic acid's chemical formula is recorded as C₇H₆O₄[13].
  • 3,4-dihydroxybenzoic acid's subclass of is recorded as dihydroxybenzoic acid[14].
  • 3,4-dihydroxybenzoic acid's Commons category is recorded as Protocatechuic acid[15].
  • 3,4-dihydroxybenzoic acid's MeSH descriptor ID is recorded as C009091[16].
  • 3,4-dihydroxybenzoic acid's has part is recorded as oxygen[17].
  • 3,4-dihydroxybenzoic acid's has part is recorded as carbon[18].
  • 3,4-dihydroxybenzoic acid's ChEMBL ID is recorded as CHEMBL37537[19].
  • 3,4-dihydroxybenzoic acid's PDB structure ID is recorded as 2BUV[20].
  • 3,4-dihydroxybenzoic acid's PDB structure ID is recorded as 3PCA[21].
  • 3,4-dihydroxybenzoic acid's PDB structure ID is recorded as 1B4U[22].
  • 3,4-dihydroxybenzoic acid's PDB structure ID is recorded as 3LMX[23].
  • 3,4-dihydroxybenzoic acid's PDB structure ID is recorded as 1EOB[24].
  • 3,4-dihydroxybenzoic acid's PDB structure ID is recorded as 4RGX[25].
  • 3,4-dihydroxybenzoic acid's PDB structure ID is recorded as 1N8Q[26].
  • 3,4-dihydroxybenzoic acid's PDB structure ID is recorded as 1PHH[27].

Why It Matters

3,4-dihydroxybenzoic acid ranks in the top 6% of type_of_chemical_entity entities by monthly Wikipedia readership (80 views/month).[2] It has Wikipedia articles in 11 language editions, a strong signal of global cultural recognition.[28] It is known by 21 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] ↑ . Human Bitter Taste Receptors Are Activated by Different Classes of Polyphenols. wikidata.org.
  5. [7] ↑ . Global Substance Registration System. Retrieved . commonchemistry.cas.org. Provenance: wikidata.org.
  6. [8] ↑ . Global Substance Registration System. Retrieved . wikidata.org.
  7. [9] ↑ . PubChem. Retrieved . wikidata.org.
  8. [10] ↑ . 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] ↑ . Medical Subject Headings. Retrieved . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . ChEMBL. Retrieved . wikidata.org.
  18. [20] ↑ . Protein Data Bank. Retrieved . wikidata.org.
  19. [21] ↑ . Protein Data Bank. Retrieved . wikidata.org.
  20. [22] ↑ . Protein Data Bank. Retrieved . wikidata.org.
  21. [23] ↑ . Protein Data Bank. Retrieved . wikidata.org.
  22. [24] ↑ . Protein Data Bank. Retrieved . wikidata.org.
  23. [25] ↑ . Protein Data Bank. Retrieved . wikidata.org.
  24. [26] ↑ . Protein Data Bank. Retrieved . wikidata.org.
  25. [27] ↑ . Protein Data Bank. 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). 3,4-dihydroxybenzoic acid. Retrieved May 3, 2026, from https://4ort.xyz/entity/3-4-dihydroxybenzoic-acid
MLA “3,4-dihydroxybenzoic acid.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/3-4-dihydroxybenzoic-acid.
BibTeX @misc{4ortxyz_3-4-dihydroxybenzoic-acid_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{3,4-dihydroxybenzoic acid}}, year = {2026}, url = {https://4ort.xyz/entity/3-4-dihydroxybenzoic-acid}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 3,4-dihydroxybenzoic acid — https://4ort.xyz/entity/3-4-dihydroxybenzoic-acid (retrieved 2026-05-03)

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