Ionized hydrogen peroxide

• Comment: Refs. 3 and 8 (the FIRST TWO references I checked) both resolve to papers with completely unrelated titles and authors, on completely unrelated topics. As if the pointless table and bullet-point hell weren't signs enough that this article is an LLM product. An article created without effort can be rejected without effort. Find another place to troll. WeirdNAnnoyed (talk) 23:36, 9 August 2026 (UTC)

• Comment: In accordance with the Wikimedia Foundation's Terms of Use, I disclose that I have been paid by my employer for my contributions to this article. Brittany Buchman at SteraMist (talk) 21:35, 18 June 2026 (UTC)

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Not to be confused with Vaporized hydrogen peroxide.

Ionized Hydrogen Peroxide (iHP)

Process type	Decontamination & Sterilization

Ionized hydrogen peroxide (iHP) is a low-concentration antimicrobial decontamination and sterilization technology. Unlike traditional vaporized hydrogen peroxide (VHP) or mechanical misting systems, iHP utilizes a cold plasma arc to structurally alter a liquid hydrogen peroxide aerosol into reactive oxygen species (ROS), primarily hydroxyl radicals ($\cdot \mathrm{O}\mathrm{H}$). It is used for broad-spectrum pathogen inactivation in biosecurity, healthcare facility decontamination, pharmaceutical cleanrooms, and agricultural processing.

Mechanism of action

The fundamental chemical process behind iHP involves passing a low-concentration liquid solution of hydrogen peroxide (typically 7.8%) through a specialized high-voltage cold plasma arc. As the micro-droplets pass through the arc, the mechanical and electrical energy splits the stable hydrogen peroxide molecule ($\mathrm{H}{\phantom{A}}_2\mathrm{O}{\phantom{A}}_2$) into specialized clusters and radical streams:

${\text{H}}_2{\text{O}}_2\stackrel{\text{Cold Plasma}}{\to }2\cdot \text{OH}$

The resulting aerosol contains high concentrations of hydroxyl radicals. In molecular dynamics, these vertical ionization processes create micro-hydrated hydrogen peroxide clusters that exhibit a strong electrostatic charge.

This ionization yields two key operational characteristics:

• Mutually Repulsive Droplets: The electrostatic charge causes the individual micro-droplets in the aerosol to repel one another. This allows the gas-like mist to disperse rapidly and uniformly throughout an enclosed space, reaching hidden or shadowed surfaces that traditional sprays or gravity-fed fogs miss.
• Oxidation Cascade: The hydroxyl radicals possess an extremely high oxidation potential. Upon coming into contact with a microorganism, the radicals immediately strip electrons from cellular membranes, proteins, and genomic structures (DNA/RNA). This rapid lysis inactivates pathogens within seconds of contact.

Comparison with Vaporized Hydrogen Peroxide

While both technologies utilize hydrogen peroxide for microbial inactivation, iHP differs substantially from legacy VHP systems in concentration, environmental requirements, and cycle speeds.

Comparison of iHP and VHP Attributes

Feature	Ionized Hydrogen Peroxide (iHP)	Vaporized Hydrogen Peroxide (VHP)
Typical Concentration	Low (~7.8% solution)	High (35% to 59% solution)
Active Substantive Unit	Hydroxyl radicals ($\cdot \mathrm{O}\mathrm{H}$)	Gaseous $\mathrm{H}{\phantom{A}}_2\mathrm{O}{\phantom{A}}_2$ molecules
Room Pre-Conditioning	None required (functions in natural humidity)	Strict dehumidification required to prevent condensation
Corrosivity Profile	Non-corrosive to sensitive electronics	High risk of surface corrosion over repeated exposures
Cycle & Aeration Time	Rapid (minutes to hours depending on space)	Protracted (requires heavy aeration to remove toxic residuals)

Applications

Healthcare and PPE sterilization

iHP is utilized in clinical settings to eliminate healthcare-associated pathogens such as Clostridioides difficile, MRSA, and noroviruses. During critical medical supply shortages (such as the COVID-19 pandemic), rigorous testing validated iHP technology for the rapid decontamination of personal protective equipment (PPE), including N95 respirators, demonstrating complete pathogen eradication without compromising the material's electrostatic filtration efficiency or physical fit.

Laboratory and cleanroom validation

In high-containment life science laboratories, biomedical research facilities, and pharmaceutical cleanrooms, strict protocols govern the decontamination of enclosed spaces and equipment, such as biosafety cabinets and material transfer hatches. Peer-reviewed research published in Applied Biosafety evaluated the spatial diffusion and efficacy of iHP systems, demonstrating consistent six-log reductions (complete inactivation) of highly resilient bacterial endospores, specifically Geobacillus stearophilus and Bacillus atrophaeus, which serve as the universal regulatory standards for sterilization validation. Because the cold plasma-activated aerosol relies on highly reactive hydroxyl radicals rather than high chemical concentrations, the technology achieves rapid microbial kill rates inside complex structural geometries and dead-end plenums without leaving chemical residues or requiring protracted aeration periods.

Agriculture and food safety

Cold plasma-activated iHP aerosols are increasingly utilized to reduce foodborne pathogens on post-harvest fresh produce. Studies have shown significant logarithmic reductions of Salmonella and Listeria strains on commodities like apples, tomatoes, lettuce, and cantaloupes. Because the hydroxyl radicals rapidly collapse back into water vapor ($\mathrm{H}{\phantom{A}}_2\mathrm{O}$) and oxygen ($\mathrm{O}{\phantom{A}}_2$), post-treatment residues remain well within safe regulatory thresholds.

Ecological biosecurity

In entomological and agricultural biosecurity, iHP has been deployed to mitigate viral spread in managed ecosystems. Notably, research backed by the United States Department of Agriculture (USDA) proved that iHP treatments effectively inactivate Deformed wing virus (DWV) on solid apiary substrates, providing beekeepers a viable path to sanitize hive equipment without harming honey bee behavior or introducing pesticide residues.

Commercialization

The primary commercial application and development of ionized hydrogen peroxide technology was engineered under the brand name SteraMist, manufactured by TOMI Environmental Solutions, Inc. Originally adapted from defense-related biosecurity research under a grant from the Defense Advanced Research Projects Agency (DARPA) to counter biological warfare threats, the system was subsequently registered with the United States Environmental Protection Agency (EPA) and listed as a medical device disinfectant with the Food and Drug Administration (FDA). Commercial platforms utilize automated whole-room configurations, building management system integrations, and handheld point-and-spray applicators to deploy the plasma-activated mist across regulated industries, including the commercial restoration, life sciences, and biopharmaceutical sectors.

See also

• Cold plasma
• Sterilization (microbiology)
• Hydroxyl radical
• Vaporized hydrogen peroxide
• Decontamination

References

This article "Ionized hydrogen peroxide" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:Ionized hydrogen peroxide. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.

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