Sodium hypochlorite is the active component in BLEACH Whether it’s 1% or 6% the antibacterial activity is the same because bacteria are small and even a low concentration will destroy them ! But …. The BIOFILM and therefore tissue dissolving speed of 6% is 6x faster than 1% So if you do single visit Endo without the protein denaturing effect of calcium hydroxide then you should use the highest percentage you can get your hands on. In my experience addition of a surfactant is helpful BUT only whe