It is widely held that a 20g ClO2 tablet can be used for a variety of applications due to its powerful disinfectant properties. Some potential uses include:

1. Water purification: The tablet can be dissolved in water to effectively kill bacteria, viruses, and other pathogens*, making it safe for drinking and other uses.
2. Surface sanitation: The tablet can be dissolved in water and used to disinfect surfaces in hospitals, laboratories, food processing facilities, and other high-risk environments.
3. Mold and mildew removal: The tablet can be used to kill mold and mildew on surfaces such as walls, ceilings, and floors.
4. Odor elimination: The tablet can be used to eliminate odors caused by bacteria and other microorganisms in areas such as bathrooms, kitchens, and garbage bins.
5. Agricultural applications: The tablet can be used to disinfect irrigation water, equipment, and storage facilities in agriculture to prevent the spread of diseases and pests.
6. Emergency response: The tablet can be used in emergency situations, such as natural disasters or outbreaks of infectious diseases, to quickly disinfect water and surfaces.

Overall, a 20g ClO2 tablet is a versatile and effective sanitizer that can be used in a wide range of applications to ensure a safe and healthy environment.