Chlorine bleach based disinfectant tablets. More convenient and safer to use than traditional liquid hypochlorite bleach. One or two tablets in a bucket of
water dissolves with an effervescent action to give a solution of ready-to use bleach.
The active constituent is dichloroiscyanurate. Each tablet yields 200ppm of available chlorine when placed in 5 litres of cold water.

Chlorine tablets if used at a dilution of 10,000 ppm (parts per million) it will kill HIV, Hepatitis B etc. In simple terms 1 tablet in 100ml of water will give them the solution they need with a contact time of 2 minutes.