Shachihata Co., Ltd. Presents a Poster on New Uses for Hypochlorous Acid at the 52nd Annual Meeting of the Japan Society for Antibacterial and Antifungal Agents Shachihata Co., Ltd. Press Release: October 31, 2025 To Members of the Media Poster presentation on new uses for hypochlorous acid at the 52nd Annual Meeting of the Japanese Society for Antibacterial and Antifungal Agents ~Proprietary technology used in the toilet spray “MIERUMO”~ Shachihata Co., Ltd.* (President and CEO: Seigo Funahashi, Headquarters: Nagoya, Aichi Prefecture), which continues to provide “signature value” for the next 100 years in its pursuit of a user-first approach, presented a poster at the 52nd Annual Meeting of the Japanese Society of Antibacterial and Antifungal Agents on the proprietary technology used in its toilet spray “MIERUMO,” which was test-sold on the support purchase service Makuake in September 2024, as a new way to utilize hypochlorous acid. ※The company name is written as “Shachihata,” not “Shachihata.” The Japan Society for Antibacterial and Antifungal Agents is an academic society whose purpose is to contribute to the development of science and technology by establishing a comprehensive research system through exchanges and information sharing among researchers and engineers from different fields of expertise in order to control microorganisms and substances derived from them related to food, clothing, and shelter, and to improve living and production environments. Shachihata recently presented a poster showcasing its unique technology (international patent pending) that combines colorants and erasing agents to make objects visible. This technology is also used in “MIERUMO,” a spray that makes urine splashes visible, which was test-marketed in September 2024. Shachihata will continue to develop products and services that apply visualization technology as a new “value of signs.”
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https://prcdn.freetls.fastly.net/release_image/5556/388/5556-388-0c2f3c507065ef0274b90e9becf5344f-1530×2700.jpg ●Society overview Academic society name: Japanese Society of Antibacterial and Mildew Control 52nd Annual Conference
https://www.saaaj.jp/ Meeting period: Wednesday, September 24, 2025 – Friday, September 26, 2025 Meeting place: Kashijima Hoshoen (718-3 Shinmei, Ago-cho, Shima-shi, Mie 517-0502) ●Presentation contents Format: Poster Presentation Topic: A New Way to Use Hypochlorous Acid – Seeing Organic Contamination and Residual Chlorine Through Color – Purpose/Background: Organic contaminants are known to reduce the effectiveness of disinfectants such as hypochlorous acid. The presence of such organic matter in food manufacturing and medical/nursing facilities increases the risk of infection, but in reality, it is difficult to detect with the naked eye, and contamination is often assumed to have been removed by following cleaning procedures. This research utilized Patent No. 7540675, “Electron Donor Visualization Kit and Electron Donor Visualization Method,” to determine the removal of organic matter and “visualize” the effectiveness of hypochlorous acid. Contents: A spray was created by simultaneously mixing equal amounts of a 0.4 wt% sodium hypochlorite solution and a 0.5 wt% indigo carmine solution. When this spray was sprayed on a model surface contaminated with a 300 ppm (w/w) egg albumin solution, only the contaminated areas turned blue, while the uncontaminated areas were decolorized. When the spray was re-sprayed after cleaning, neither the contaminated nor uncontaminated areas developed any color, confirming that this kit can be used to determine decontamination. When equal parts of 0.4 wt% sodium hypochlorite (393 ppm available chlorine) and 0.5 wt% indigo carmine aqueous solution were mixed and egg albumin was added at final concentrations of 7500, 750, and 75 ppm (w/w), a blue color developed when the loading substance was high (7500 and 750 ppm (w/w)), and a light blue color developed when the loading substance was low (75 ppm (w/w)), and ultimately decolorized. These results suggest the possibility of immediately visualizing the decline in the disinfectant effectiveness of sodium hypochlorite. Reference: Video 1. Method for visualizing and determining removal of organic
contamination https://www.youtube.com/watch?v=a44kHDaOZ5w Video 2. Visualizing and utilizing the effectiveness of high-concentration hypochlorous acid https://www.youtube.com/watch?v=w1XOOkEsSBQ ●About “MIERUMO,” a product that uses hypochlorous acid “MIERUMO” is a toilet spray that, when sprayed into the toilet, highlights hard-to-notice urine splashes in a blue light, allowing them to be wiped away for easy cleaning. By making urine splashes visible, you can wipe away the source of the odor without missing a beat. The impetus for development came from an employee who commented, “I cleaned the toilet, but for some reason it still smells.” In response to this concern, a planning manager suggested, “Wouldn’t it be great if we could use Shachihata’s ink technology to reveal the source of the odor?” This led to the development of this product. The result was a visualization technology (international patent pending) that uses a colorant and an erasing agent (sodium hypochlorite) and a two-liquid pre-mixing method. You can easily wipe away any visible dirt.
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