Hydrogen ozonide
IUPAC name
Hydrogen ozonide
Other names
  • Trioxidanyl
  • Hydridotrioxygen
3D model (JSmol)
  • InChI=1S/HO3/c1-3-2/h1H
  • OO[O]
Molar mass 49.005 g·mol−1
Related compounds
Related compounds
Protonated ozone
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Hydrogen ozonide (HO3) is a radical molecule consisting of a hydrogen atom covalently bonded to an ozonide unit.[1]

It is possibly produced in the reaction of the hydroxyl radical with dioxygen: OH + O2 → HO3.[2][3]

It has been detected in a mass spectrometer experiment using HO+
(protonated ozone) as precursor.[4]


  1. ^ Möller, D. (2022). Chemistry for Environmental Scientists. De Gruyter Textbook. De Gruyter. p. 165. ISBN 978-3-11-073517-8. Retrieved 2022-12-28.
  2. ^ Wabner, Dietrich; Grambow, Clemens (November 1985). "Reactive intermediates during oxindation of water lead dioxide and platinum electrodes". Journal of Electroanalytical Chemistry and Interfacial Electrochemistry. 195 (1): 95–108. doi:10.1016/0022-0728(85)80008-5.
  3. ^ Chernik, A.; Drozdovich, V. B.; Zharskii, I. (1997). "Ozone evolution at the lead dioxide electrode in highly acid and neutral electrolytes : The influence of polarization and fluoride ions on the process kinetics". Russian Journal of Electrochemistry. 33 (3): 259–263. S2CID 100386365.
  4. ^ Cacace, Fulvio; de Petris, Guilia; Pepi, F.; Troiani, Anna (2 July 1999). "Experimental Detection of Hydrogen Trioxide". Science. 285 (5424): 81–82. doi:10.1126/science.285.5424.81.

Extra reading