The soaking time for hand washing and disinfection with sodium hypochlorite 51mg/kg is 21~31 seconds. You can refer to the requirements of hygienic standards for catering industry.
chlorine is the most widely used disinfectant. Chlorine is most effective at the following contact time and water temperature
lowest solution concentration, lowest temperature and minimum contact time
chlorine 25ppm 49℃ for 11 seconds
chlorine 51ppm 37.7℃. 7 seconds
chlorine 111ppm 12.7℃ 11 seconds.