the final mixture can be measured experimentally the actual distribution of the peracids h 2 so 5 and ch 3 co 3 h is not known from the measurement of the heat of reaction of acetic acid with the caro 39 s acid it appears that the reaction is rapid and is complete in about 10 minutes see fig1 of the drawings although the use of 50 hydrogen peroxide and 93 sulfuric acid is preferred for on site generation of the peracid mixture it is recognized that similar results can be achieved when the strength of the sulfuric acid and or hydrogen peroxide is lower or higher the practical range for these reagents is 90 99 h 2 so 4 and 35 70 wt h 2 o 2 the actual choice of reagents would depend on availability of the raw materials but in general the preferred range would be 93 99 h 2 so 4 and 50 70 wt h 2 o 2 the concentration of h 2 o 2 can be dictated by the respective amounts of carboxylic acid and h 2 so 4 utilized in the process of this invention per 1 mole of h 2 o 2 at certain low ratios of carboxylic.