In a concentrated fabric softening composition comprising an aqueous dispersion
of less than 30% by weight of quaternary ammonium fabric softening material which
comprises two C12-C22 alkyl or alkenyl groups connected to
the molecule via at least one ester link, such as ester quat, improved stability
of the viscosity on storage is obtained by including an unsaturated C8-C24
fatty acid, wherein the weight ratio of quaternary ammonium material to unsaturated
material is greater than 10:1.
