Abstract: Low-foaming antimicrobial concentrate and "use" composition comprising (a) an antimicrobial agent selected from the group consisting of monocarboxylic acids, dicarboxylic acids and mixtures thereof, (b) an alkyl N,N-dimethyl amine oxide solubilizer-coupling agent having between about 8 and about 10 carbon atoms in the alkyl portion, (c) an acid capable of yielding a pH less than or equal to about 5.0 upon dilution of the concentrate to a use solution, and (d) water. This composition provides effective storage stability and low-foaming sanitization when used in "in-place" processing lines such as dairies, breweries and other food processing facilities.