Safely lowering bleach pH without chlorine gas?
The oxidizing effect of chlorine is quite powerful even at concentrations of 1% or less. Mixing bleach and vinegar gives a much more concentrated solution. Although chlorine is soluble to the extent of 1.46 grams per 100 mL cold H2O (CRC Handbook), its vapor pressure above the water may be significant. A solution diluted by a factor of 7 or 8 would be in contact with a surface long enough to disinfect with a much reduced odor. Safer for people, but still deadly to bacteria.