Efficacy and Safety Evaluation of a Chlorine Dioxide Solution

Area of Science:

• Environmental Science
• Microbiology
• Toxicology

Background:

• Chlorine dioxide (ClO₂) is a potent disinfectant.
• Developing safe and effective ClO₂ solutions is crucial for public health.
• Previous reports suggest varying safety profiles for ClO₂ applications.

Purpose of the Study:

• To produce and characterize a stable chlorine dioxide solution (UC-1).
• To evaluate the antimicrobial efficacy of UC-1 against bacteria, fungi, and viruses.
• To assess the safety profile of UC-1 through various toxicity studies.

Main Methods:

• Electrolytic production and membrane purification of chlorine dioxide solution (UC-1).
• Antimicrobial activity testing against bacteria and fungi.
• Viral inhibition assays for H1N1, Influenza B, and EV71.
• Cytotoxicity (MTT assay), ocular irritation, inhalation toxicity, and subchronic oral toxicity tests.

Main Results:

• UC-1 contains 2000 ppm gaseous chlorine dioxide in water.
• Achieved >98.2% reduction of bacteria and fungi at 5 and 20 ppm, respectively.
• IC50 values for H1N1, Influenza B, and EV71 were 84.65, 95.91, and 46.39 ppm.
• High cell viability (93.7%) at 200 ppm (MTT assay).
• No significant ocular irritation, inhalation toxicity, or oral toxicity observed at tested concentrations.

Conclusions:

• UC-1 exhibits significant antimicrobial efficacy against bacteria, fungi, and viruses.
• UC-1 demonstrates a favorable safety profile across multiple toxicity assessments.
• The findings suggest UC-1 is a promising disinfectant with a better safety tendency than previously reported.