Chlorine Dioxide

A Chemical History

In previous posts, I have written about chlorine dioxide (ClO₂). But I later realized that many people may not be aware of this molecule’s fascinating history. So I decided to put together a timeline that provides a chronological picture of the original synthesis and subsequent discovery of the many different applications of this remarkable molecule.

ClO₂ is one of the most versatile and least understood molecules in modern chemistry. Most people have never heard of it, yet it protects the drinking water of hundreds of millions of people around the world, disinfects hospital surfaces, sanitizes the food on our tables, and decontaminated the U.S. Senate after the 2001 anthrax attacks. At the same time, it sits at the center of a fierce regulatory controversy, geopolitical disagreement, and, I would argue, a decades-long pattern of suppression that deserves far more scrutiny than it has received.

I have spent considerable time over the past several years studying ClO₂ including its chemistry, its history, and its emerging clinical applications. I have co-authored peer-reviewed papers on its potential use in diabetic foot ulcers and necrotizing fasciitis. I have followed the research of scientists like Howard Alliger, who pioneered ClO₂ therapeutics beginning in the late 1970s, and Dr. Norio Ogata, whose laboratory work demonstrated that low-concentration ClO₂ gas can inactivate influenza and denature the SARS-CoV-2 spike protein. The more I have learned, the more I am convinced that the full story of this molecule has not been told.

That is what this post is about.

I want readers to have a deeper understanding of the history of chlorine dioxide - where it came from, how it moved from the laboratory to the medical field, and why it has attracted both extraordinary scientific interest and enormous institutional resistance. To that end, I have compiled a comprehensive timeline spanning more than two centuries: from Sir Humphry Davy’s first synthesis of the yellow-green gas in 1811 to the most recent peer-reviewed case reports published in 2025. Each entry is supported by primary sources and peer-reviewed references, so that anyone who wishes to go deeper can follow the evidence themselves.

A few things I want to draw your attention to as you read through the timeline:

• Howard Alliger’s story is one of the most remarkable and least-known chapters in American medical history. Working in relative obscurity from the late 1970s onward, he built the scientific foundation for ClO₂’s therapeutic use by generating over 300 studies and 42 published papers, only to be sidelined by commercial forces when his company went public. His final patents, which were approved the year of his death at age 92, covered an intratumoral injection therapy for cancer.

• Bolivia’s legislative authorization of ClO₂ as a COVID-19 treatment in 2020, which was supported by its own legislature but opposed by that country’s Health Ministry, the WHO, and PAHO, illustrates the deep institutional resistance to this molecule. Whether Bolivia’s subsequent remarkable decline in COVID cases is the result of the widespread use of ClO₂ is a legitimate scientific question that deserves honest investigation, not automatic dismissal.

• Norio Ogata’s work on ClO₂ and viral spike proteins is peer-reviewed, published, and reproducible. The failure to take it seriously reflects, in my view, exactly the kind of institutional bias I have been documenting throughout this Corporate Deception series.

I have included full references at the end of the timeline for those who wish to learn more about this amazing molecule. This is not a fringe topic. The science is there. The history is there. It simply has not been assembled in one place until now.

I hope this timeline serves as a resource, a reference, and an invitation to look more carefully at a molecule that may have far more to offer medicine than we have yet been permitted to explore.

Your Knowledge Matters — Help Build This Record

This timeline represents my best effort to compile the documented history of chlorine dioxide in one place, drawing on primary sources, peer-reviewed journals, patent records, government filings, and firsthand accounts. It is comprehensive, but it is not complete. No single researcher or author can be.

If you have additional information about the history of chlorine dioxide, whether a clinical observation, a published study, a regulatory filing, a personal account from a researcher or practitioner, or a historical reference I have missed, I want to hear from you. This is exactly the kind of collaborative knowledge-building that can move the science forward.

Please share any additional information in the comments below, or reach out to me directly. I ask only that you provide supporting references or evidence where possible. The goal is not advocacy. It is accuracy. Every credible data point, properly sourced, strengthens the historical record and makes it harder to dismiss.

Chlorine dioxide has been used safely and effectively in countless industrial, agricultural, and water treatment applications for more than eighty years. Its therapeutic potential has been explored, and often suppressed, for nearly fifty years. It is time for that history to be fully told.

Thank you for reading.

References

[1] Davy H. “On a combination of oxymuriatic gas and oxygene gas.” Philosophical Transactions of the Royal Society. 1811;101:155–162.

[2] Gay-Lussac JL. “Mémoire sur l’iode.” Annales de Chimie. 1814;91:5–160.

[3] Holleman AF, Wiberg E. Inorganic Chemistry. Academic Press; 2001. pp. 453–462.

[4] Lea CS. “The bleaching of flour.” J Soc Chem Ind. 1904;23(7):253–258.

[5] Reeve DW. “Chlorine dioxide in the bleaching of pulps.” In: Pulp Bleaching: Principles and Practice. TAPPI Press; 1996. pp. 379–394.

[6] Masschelein WJ. Chlorine Dioxide: Chemistry and Environmental Impact of Oxychlorine Compounds. Ann Arbor Science Publishers; 1979.

[7] Rook JJ. “Formation of haloforms during chlorination of natural waters.” Water Treat Exam. 1974;23:234–243.

[8] US Environmental Protection Agency. Stage 1 Disinfectants and Disinfection Byproducts Rule. 63 Fed. Reg. 69390; 1998. EPA 815-F-98-010.

[9] US Food and Drug Administration. Code of Federal Regulations 21 CFR §173.300. Chlorine dioxide. FDA; 1988 (amended).

[10] Raffanti SP, Schaffner W, Fingerle V, et al. “Effect of sodium oxychlorosene (WF10) on immune activation markers in HIV-seropositive individuals.” J Acquir Immune Defic Syndr Hum Retrovirol. 1998;17(1):55–60.

[11] Hübner R, et al. “WF10 in the treatment of radiation-induced and diabetic wound healing.” Eur J Cancer. 2002;38(suppl 4):S14.

[12] US EPA. Decontamination of the Hart Senate Office Building. EPA 600-R-05-136; 2005; CDC MMWR 2002;51(RR-13):1–20.

[13] US Environmental Protection Agency. Reregistration Eligibility Decision: Chlorine Dioxide and Sodium Chlorite. EPA 738-R-06-007; 2006.

[14] Humble J. Breakthrough: The Miracle Mineral Solution of the 21st Century. Self-published; 2006.

[15] US Food and Drug Administration. MMS Safety Communication. July 30, 2010.

[16] US Food and Drug Administration. MMS Safety Communication. August 12, 2019.

[17] Bolivia Legislative Assembly. Ley No. 1351: Ley de Autorización del Dióxido de Cloro. La Paz; 2020.

[18] Pan American Health Organization. “Epidemiological Alert: Ingestion of chlorine dioxide solutions in the context of COVID-19.” PAHO/WHO; August 7, 2020.

[19] Schink M, Lassmann S, Gröschl M, et al. “Immunological effects of WF10 in patients with radiation-induced mucositis.” Anticancer Res. 2016;36(3):1069–1077.

[20] Ogata N, Miura T. “Inhibition of the Binding of Spike Protein of SARS-CoV-2 Coronavirus to Human Angiotensin-Converting Enzyme 2 by Chlorine Dioxide.” Ann Pharmacol Pharm. 2020;5(5):1195.

[21] Ogata N, Miura T. “Effect of Chlorine Dioxide Gas on the Binding of SARS-CoV-2 Coronavirus Spike Protein to a Human Receptor.” Ann Pharmacol Pharm. 2021;6(1):1202.

[22] Ogata N, Miura T. “Inhibition of the Binding of Variants of SARS-CoV-2 Coronavirus Spike Protein to a Human Receptor by Chlorine Dioxide.” Ann Pharmacol Pharm. 2021;6(1):1199.

[23] Ogata N, Shibata T. “Protective effect of low-concentration chlorine dioxide gas against influenza A virus infection.” J Gen Virol. 2008;89(Pt 1):60–67. Also: Ogata N. “Denaturation of protein by chlorine dioxide.” Biochemistry. 2007;46:4898–4911.

[24] Ogata N, Shibata T. “Effect of chlorine dioxide gas of extremely low concentration on absenteeism of schoolchildren.” Int J Med Med Sci. 2009;1(7):288–289.

[25] Kory P, McCarthy J. The War on Chlorine Dioxide: The Medicine That Could End Medicine. January 2026. Also: Kory P. “Bolivia’s Use of Chlorine Dioxide Led to Best COVID Outcomes in South America.” Substack, 2024.

[26] American Water Works Association. Chlorine Dioxide: Generation and Application in Drinking Water. AWWA Manual M21. 3rd ed. Denver, CO: AWWA; 2020.

[27] Waronchlorinedioxide.com. Book description and author biography. Accessed May 2026.

[28] NASA Office of Commercial Programs. “A Universal Antidote.” In: Spinoff 1988. Washington, DC: NASA Technology Utilization Division; 1988. pp. 118–121. Available: https://spinoff.nasa.gov/back_issues_archives/1988.pdf. [Profile of Alcide Corporation’s ClO₂-based antimicrobial product, developed with NASA Industrial Application Center support. An earlier profile appeared as “A Multipurpose Compound” in Spinoff 1983, pp. 86–87.]

[29] Frontier Pharmaceutical, Inc. “Pioneering Chlorine Dioxide Solutions Since 1993: History of Howard Alliger.” frontierpharm.com/pages/about-us. Accessed May 2026.

[30] Alliger H. US Patent 4,084,747. “Germ Killing Composition and Method.” Filed 1977; granted April 18, 1978. [First small-scale ClO₂ generation patent for skin/wound applications including acne.] Also: Alliger H. US Patent 4,330,531. “Biocidal Methods and Compositions.” Granted May 18, 1982.

[31] Walker HL, et al. “Topical Use of Sodium Chlorite-Lactic Acid Gel in Pseudomonas Burn Wound Sepsis.” US Army Institute of Surgical Research; 1980. [Alcide gel formula tested at Brooke Army Medical Center; one treatment produced ‘excellent results.’]

[32] Abdel-Rahman MS, Gerges SE, Alliger H. Clinical and laboratory evaluation of Alcide for herpes simplex infections. Preliminary report, 1982. [15 of 16 perioral herpes cases: prompt remission; 5 of 6 genital herpes: prompt remission; no recurrences at 6 months.] Referenced in: The Universal Antidote Interactive Reference Guidebook. 2nd ed. 2022.

[33] Alliger H. US Patent 10,105,389. “Method and Compositions for Treating Cancerous Tumors.” Frontier Pharmaceutical, Inc. Filed 2017; granted October 22, 2018. [INtume™: intratumorally injected ClO₂; mechanism: oxidation of tumor polyamines → H₂O₂ + aldehydes → cancer cell apoptosis; normal cells spared by higher catalase.] Also: US Patent 10,463,690, granted November 5, 2019.

[34] Kory P. “The History of Howard Alliger — Pioneer of Chlorine Dioxide Therapies.” Pierre Kory’s Medical Musings (Substack). April 1, 2025. [Sourced from Alliger radio interview transcript and communications with Valerie Alliger-Bograd, CEO, Frontier Pharmaceutical.]

[35] Callisperis P, Andrade Y, Pineda Aquino R, Vargas M, Raj Kota S, Liester MB. “Chlorine dioxide and chlorite as treatments for diabetic foot ulcers.” Int J Med Med Sci. 2024;16(1):1–14. DOI: 10.5897/IJMMS2023.1503. [Seven proposed mechanisms identified: hyperglycemia reduction, oxidative stress, vasculopathy, neuropathy, inflammation, infection, wound healing.]

[36] Callisperis P, Liester MB, Pineda Aquino R, et al. “Chlorine dioxide treatment for diabetic foot ulcers: Three case studies.” Int J Med Med Sci. 2024;16(2):44–49. DOI: 10.5897/IJMMS2024.1515. [Three patients with DFUs refractory to standard care; one patient fully healed at 6 months, no recurrence at 3 years, blood sugars normal without medication.]

[37] Callisperis P, Franco-Paredes C, Liester MB. “Necrotizing Fasciitis Treatment With Chlorine Dioxide: A Case Report in an Immunocompromised Patient.” Cureus. 2025;17(7):e88800. DOI: 10.7759/cureus.88800. [Fournier’s gangrene in a patient with cirrhosis, CKD, and T2DM; ClO₂ used as adjunctive topical treatment following surgical debridement; patient survived.]