#$%^&*AU2015203851B220170105.pdf#####ABSTRACT A process for producing an aqueous chlorous acid solution, comprising the steps of: adding to a chlorous acid-containing solution at least one compound selected from the group consisting of inorganic and organic acids and salts or a combination thereof, to provide long-term stabilization of said chlorous acid for delaying the conversion of chlorous acid to chlorine dioxide and produce the aqueous chlorous acid solution in a form that is capable of sustaining chlorous acid for an extended time, wherein the pH of the aqueous chlorous acid solution is in the range of 3.2 to 8.0.9/9 Fig. 17 pH Fig.1 7 The time-course changes in pH values of the aqueous chlorous acid solutions and conbentional ASC solution 6.5 6 5.5 -- SampleA 5 --- SampleB 4.5 -&-- Samplec 4 -x-- SampleD 3.5 3 2.5 0 5 10 15 20 25 30 Day