File:Potassium_nitrate.jpg · Wikimedia Commons · See Wikimedia Commons
potassium nitrate
Sign in to saveAlso known as Nitric acid, potassium salt, Saltpeter, Nitrate of potash, Niter, Salt peter, Nitre, saltpetre
chemical compound
OverviewAI-generated
Potassium nitrate is a chemical compound with the formula KNO₃. It has a molar mass of 100.952 and a density of 2.109. The substance possesses a Mohs' hardness of 2 and a standard enthalpy of formation of -494. Its melting point is 337, while its boiling point and decomposition point are both 400. The molar fusion enthalpy is 9.80.
In terms of molecular structure, potassium nitrate has a charge of 0. It contains 3 hydrogen bond acceptors and 0 hydrogen bond donors, with a topological polar surface area of 62.9. The canonical SMILES representation is [N+](=O)([O-])[O-].[K+].
The compound is referenced by 1,094 other encyclopedia articles. Additionally, there are 1,299 related entries in the PubMed database.
Synthesized by Vinony from 23 facts across 4 sources: Wikidata, PubChem, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.
Chemical data
- Formula
- KNO3
- Molecular weight
- 101.103 g/mol
- IUPAC name
- potassium nitrate
- SMILES
- [N+](=O)([O-])[O-].[K+]
- InChIKey
- FGIUAXJPYTZDNR-UHFFFAOYSA-N
- Polar surface area
- 62.9 Ų
- H-bond donors
- 0
- H-bond acceptors
- 3
- Formal charge
- 0
via PubChem
Research
1,299 papers- Potassium nitrate toothpaste for dentine hypersensitivity.The Cochrane database of systematic reviews · 2001Poulsen S, Errboe M, Hovgaard O et al.DOI: 10.1002/14651858.CD001476
- Potassium Nitrate in Heart Failure With Preserved Ejection Fraction: A Randomized Clinical Trial.JAMA cardiology · 2025Zamani P, Shah SJ, Cohen JB et al.DOI: 10.1001/jamacardio.2024.4417
- Does the addition of potassium nitrate to carbamide peroxide gel reduce sensitivity during at-home bleaching?Australian dental journal · 2020Costacurta AO, Kunz P, Silva RC et al.DOI: 10.1111/adj.12739
- Potassium nitrate suppresses hyperactivities of Vc neurons of the model with dentin hypersensitivity.Journal of oral biosciences · 2024Sugawara S, Iwata K, Takamizawa T et al.DOI: 10.1016/j.job.2024.09.005
- Potassium nitrate.General dentistry · 2000Hodosh M
- Potassium nitrate (kno₃) seed priming enhances soybean seed performance.Scientific reports · 2025Da Rocha LG, Rau BA, Da Silva DM et al.DOI: 10.1038/s41598-025-11498-6
- Potassium nitrate and nitrosamine formation.Nutrition and cancer · 1983Lintas C, Ibba P, Cundari E et al.DOI: 10.1080/01635588309513790
- Evaluation of the efficacy of potassium nitrate and sodium fluoride as desensitizing agents during tooth bleaching treatment—A systematic review and meta-analysis.Journal of dentistry · 2015Wang Y, Gao J, Jiang T et al.DOI: 10.1016/j.jdent.2015.03.015
via PubMed
Wikidata facts
- Subclass of
- chemical compound
- Has part
- oxygen
- Mass
- 100.952
- Has use
- nitrogen fertilizer
Show 12 more facts
- melting point
- 334
- decomposition point
- 400
- standard enthalpy of formation
- -494
- Commons category
- Potassium nitrate
- chemical formula
- KNO₃
- molar fusion enthalpy
- 9.80
- canonical SMILES
- [N+](=O)([O-])[O-].[K+]
- Mohs' hardness
- 2
- density
- 2.109
- boiling point
- 400
- safety classification and labelling
- Regulation (EC) No. 1272/2008
- on focus list of Wikimedia project
- Wikipedia:Vital articles/Level/4
via Wikidata · CC0
~18 min read
Encyclopedic overview
Names
IUPAC name Potassium nitrate
Excerpted from Wikipedia’s “potassium nitrate” article, available under the CC BY-SA 4.0 licence.
Gallery (12)
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