Chlorine Dioxide versus Bleach
Though chemically related, chlorine dioxide and bleach (sodium hypochlorite) are not quite the same. But, the difference between the two may be substantial.
1- Chlorine Dioxide is a great "Broad Spectrum" sanitizer that is more effective again gram-negative and gram-positive bacteria. Chlorine dioxide will also kill cysts and protozoa, which is why it is good for water purification. Bleach does not kill cysts and protozoa. Neither is it have as broad spectrum of bacteria kill.
2- Santizing treatments for bleach is measured in minute, even hours. Chlorine dioxide is a sanitizing agent that can kill germs in seconds to minutes.
3- While an effective strength of 5,000 to 10,000 PPM is required for bleach to properly sanitize, chlorine dioxide will do the same work at 50 to 1,000 PPM.
The science is very much in favor of chlorine dioxide, but remember that both products come with substantial warnings about mixing with other chemical that can react violently or cause harmful fumes. So, stick with a pure product. And, follow the instructions for safe use of the product.
We see bleach, at weaker dilutions, used at the household level for routine cleaning. Chlorine dioxide is used in more professional applications because the offgassing requires a protective mask during application as well as other reasonable precuations. The good news is that chlorine dioxide does not have the bleaching threat unless applied at high levels of concentration or for long periods of time.