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nitrous acid

chemical compound
ChemicalSubstance type_of_chemical_entity Q211891
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nitrous acid

Summary

nitrous acid is a type of chemical entity[1]. It ranks in the top 5% of type_of_chemical_entity entities by monthly Wikipedia readership (569 views/month).[2]

Key Facts

  • nitrous acid's instance of is recorded as type of chemical entity[3].
  • nitrous acid's canonical SMILES is recorded as N(=O)O[4].
  • nitrous acid's chemical formula is recorded as HNO₂[5].
  • nitrous acid is a type of monoprotic acid[6].
  • nitrous acid is a type of mineral acid[7].
  • nitrous acid is a type of nitrogen oxoacid[8].
  • nitrous acid's Commons category is recorded as Nitrous acid[9].
  • nitrous acid comprises nitrogen[10].
  • nitrous acid comprises hydrogen[11].
  • nitrous acid comprises oxygen[12].
  • nitrous acid's found in taxon is recorded as Leonurus sibiricus[13].
  • nitrous acid's found in taxon is recorded as Homo sapiens[14].
  • nitrous acid's pKa is recorded as {'amount': '+3.2'}[15].
  • nitrous acid's described by source is recorded as Small Brockhaus and Efron Encyclopedic Dictionary[16].
  • nitrous acid's described by source is recorded as Brockhaus and Efron Encyclopedic Dictionary[17].
  • nitrous acid's described by source is recorded as Great Soviet Encyclopedia (1926–1947)[18].
  • nitrous acid's described by source is recorded as Encyclopedic Lexicon[19].
  • nitrous acid's described by source is recorded as Armenian Soviet Encyclopedia, vol. 1[20].
  • nitrous acid's has characteristic is recorded as weak acid[21].
  • nitrous acid's different from is recorded as nitric acid[22].
  • nitrous acid's mass is recorded as {'unit': 'Q483261', 'amount': '+47.001'}[23].
  • nitrous acid's melting point is recorded as {'unit': 'Q25267', 'amount': '+42.35'}[24].
  • nitrous acid's boiling point is recorded as {'unit': 'Q25267', 'amount': '+158'}[25].

Why It Matters

nitrous acid ranks in the top 5% of type_of_chemical_entity entities by monthly Wikipedia readership (569 views/month).[2] It has Wikipedia articles in 25 language editions, a strong signal of global cultural recognition.[26] It is known by 14 alternative names across languages and contexts.[27]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . PubChem. Retrieved . wikidata.org.
  3. [5] ↑ . PubChem. Retrieved . 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] ↑ . Studies on the Constituents of Leonurus sibiricus L.. wikidata.org.
  12. [14] ↑ . Recon 2.2: from reconstruction to model of human metabolism. wikidata.org.
  13. [15] ↑ . Chemia analityczna (2008). 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] ↑ . PubChem. Retrieved . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [26] ↑ . Wikidata sitelinks. wikidata.org.
  3. [27] ↑ . 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). nitrous acid. Retrieved May 3, 2026, from https://4ort.xyz/entity/nitrous-acid
MLA “nitrous acid.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/nitrous-acid.
BibTeX @misc{4ortxyz_nitrous-acid_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{nitrous acid}}, year = {2026}, url = {https://4ort.xyz/entity/nitrous-acid}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): nitrous acid — https://4ort.xyz/entity/nitrous-acid (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/nitrous-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. 7d ago · Twofivesixbot bot · 2026-05-24 view diff on Wikidata ↗
    Found in taxon → Leonurus sibiricus, Homo sapiens
    Instance of → type of chemical entity
    Boiling point → {'unit': 'Q25267', 'amount': '+158'}
    Pka → {'amount': '+3.2'}
    + 11 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|3 */ [[Property:P8189]]: 987007531400605171, mv to monolingual text names on J9U statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.