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Also known as O3, [OO2], O₃, triatomic oxygen

Ozone (), also called trioxygen, is an inorganic molecule with the chemical formula ''''''. It is a pale-blue gas with a distinctively pungent odour. It is an allotrope of oxygen that is much less stable than the diatomic allotrope , breaking down in the lower atmosphere to (dioxygen). Ozone is formed from dioxygen by the action of ultraviolet (UV) light and electrical discharges within the Earth's atmosphere. It is present in very low concentrations throughout the atmosphere, with its highest concentration high in the ozone layer of the stratosphere, which absorbs most of the Sun's ultraviole

OverviewAI-generated

Ozone is a chemical substance with the formula O₃. It has a molecular mass of 47.985 and a density of 0.0021445. The compound features an electric dipole moment of 0.534 and a standard molar entropy of 238.9. Its ionization energy is 12.52.

Physical properties include a melting point of -193, -315, or -197.2, and a boiling point of -169, -111.9, or -111.35. The vapor pressure is 1, and solubility is 0.001. Ozone has zero hydrogen bond donors and two hydrogen bond acceptors. It is immediately dangerous to life or health at a concentration of 9.8. Exposure limits are set at a ceiling of 0.2 and a time-weighted average of 0.2.

Synthesized by Vinony from 30 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: O3
Molecular weight: 47.998 g/mol
IUPAC name: ozone
SMILES: [O-][O+]=O
InChIKey: CBENFWSGALASAD-UHFFFAOYSA-N
XLogP: -1.7
Polar surface area: 41.1 Å²
H-bond donors: 0
H-bond acceptors: 2
Formal charge: 0

via PubChem

Drug data · ChEMBL

Max clinical phase: Phase 3
Molecule type: Small molecule
Indications: diabetes mellitus, interstitial cystitis, COVID-19, keratitis

via ChEMBL · EBI

Research

36,516 papers

Application of ozone for degradation of mycotoxins in food: A review.ReviewComprehensive reviews in food science and food safety · 2020Afsah-Hejri L, Hajeb P, Ehsani RJDOI: 10.1111/1541-4337.12594
Liquid ozone therapies for the treatment of epithelial wounds: A systematic review and meta-analysis.International wound journal · 2023Romary DJ, Landsberger SA, Bradner KN et al.DOI: 10.1111/iwj.13941
Ozone as a promising method for controlling Pseudomonas spp. biofilm in the food industry: a systematic review.Biofouling · 2024Nogueira Leite N, Garcia Sperandio V, da Piedade Edmundo Sitoe E et al.DOI: 10.1080/08927014.2024.2420002
A critical evaluation of the use of ozone and its derivatives in dentistry.ReviewEuropean review for medical and pharmacological sciences · 2020Tricarico G, Rodrigues Orlandin J, Rocchetti V et al.DOI: 10.26355/eurrev_202009_22854
A new mechanism for the toxicity of ozone.ReviewToxicology letters · 1995Pryor WA, Squadrito GL, Friedman MDOI: 10.1016/0378-4274(95)03563-x
Molecular effects of ozone on amino acids and proteins, especially human hemoglobin and albumin, and the need to personalize ozone concentration in major ozone autohemotherapy.ReviewCritical reviews in clinical laboratory sciences · 2023Mehraban F, Seyedarabi ADOI: 10.1080/10408363.2023.2185765
Ozone-modified properties of pumpkin seed oil as anti-H. pylori, anticancer, anti-diabetic and anti-obesity agent.Scientific reports · 2025Alsalamah SA, Alghonaim MI, Mohammad AM et al.DOI: 10.1038/s41598-025-11123-6
Reliable and effective oxygen-ozone therapy at a crossroads with ozonated saline infusion and ozone rectal insufflation.ReviewThe Journal of pharmacy and pharmacology · 2012Bocci V, Zanardi I, Borrelli E et al.DOI: 10.1111/j.2042-7158.2011.01427.x

Wikidata facts

Subclass of: oxidizing agent
Has part: oxygen
Mass: 47.985
Image: Ozone-montage.png
Has use: ozone therapy

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described by source: Encyclopædia Britannica 11th edition
ceiling exposure limit: 0.2
Commons category: Ozone
topic's main category: Category:Ozone
chemical formula: O₃
canonical SMILES: [O-][O+]=O
solubility: 0.001
melting point: -197.2
time-weighted average exposure limit: 0.2
NIOSH Pocket Guide ID: 0476
immediately dangerous to life or health: 9.8
boiling point: -111.35
vapor pressure: 1
ionization energy: 12.43
density: 0.0021445
electric dipole moment: 0.534
standard molar entropy: 238.9
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
different from: cyclic ozone
Stack Exchange tag: chemistry.stackexchange.com/tags/ozone

Sources (9)

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