How many percent of bleach of an effective disinfectant?

For effective disinfection, a bleach solution typically contains 5-10% sodium hypochlorite. This concentration is commonly recommended for household cleaning and disinfecting surfaces. For specific applications, such as sanitizing food contact surfaces, a diluted solution of 1,000-5,000 ppm (parts per million) of sodium hypochlorite may be used, which translates to about 0.1-0.5% concentration. Always follow the manufacturer's instructions for the best results.