Abstract: Low foaming acid sanitizer compositions containing anionic surfactants which normally exhibit high-foaming, e.g. dodecyl benzene sulfonic acid, are obtained by incorporating in the composition a foam suppressant combination of a C.sub.8 -C.sub.18 -aliphatic alcohol, or a C.sub.9 -C.sub.12 -alkyl-phenol, e.g. tridecyl alcohol and a polyvalent metal salt, e.g. aluminium sulfate. The usual solubilizers such as propylene glycol and isopropyl alcohol can be present as optional ingredients. Anti-microbial properties of the composition are not adversely affected by the foam suppressants and the compositions exhibit low foaming even in deionized water.