An anionic detergent composition having an inverse foam to temperature relationship is disclosed, as well as a composition for accomplishing this relationship when added to a detergent system. The inverse foam to temperature relationship is provided by a synergistic mixture of a fatty acid containing between about eight and 30 carbon atoms in the alkyl chain and a polyethoxylated mono fatty alkyl quaternary ammonium methosulfate, chloride, bromide, nitrate or sulfate salt having about 10 to 50 moles of ethylene oxide.
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