Liquid detergent composition

A liquid detergent composition consisting essentially of the following components (a), (b) and (c):

• (a) a compound of formula (1):
• ##STR7## wherein R.sup.1 is a C.sub.8 -C.sub.12 linear hydrocarbon group, R.sup.4 is a C.sub.1 -C.sub.4 linear hydrocarbon group and X.sup.1 and X.sup.2 are, independently, a potassium atom or a hydrogen atom;
• (b) a compound of formula (2):
• ##STR8## wherein R.sup.2 is a C.sub.11 -C.sub.15 linear hydrocarbon group and X.sup.3 and X.sup.4 are, independently, a potassium atom or a hydrogen atom;
• (c) a surfactant selected from the group consisting of the following surfactants (1), (2), (3) and (4):
• (1) an anionic surfactant selected from the group consisting of alkyl sulfate, polyoxyethylene alkyl sulfate, sulfosuccinate, taurate, isethionate, alphaolefinsulfonate, aliphatic soap, ethercarboxylic surfactant and acylated amino acid surfactant;
• (2) an amphoteric surfactant selected from the group consisting of carbobetaine, sulfobetaine and imidazolinium betaine;
• (3) a nonionic surfactant selected from the group consisting of polyoxyalkylene adduct, polyoxypropylene-polyoxyethylene adduct, amine oxide, mono or di-ethanolamide, sorbitan fatty acid ester, glyceryl fatty acid ester, sucrose fatty acid ester, alkyl saccharide, and N-polyhydroxyalkyl fatty acid amide;
• and
• (4) a cationic surfactant which is mono- or di-alkyl adduct quaternary ammonium salt having a linear or branched alkyl group, where the alkyl group may or may not contain alkylene oxide units;
• and
• (d) water to make up the balance;
• wherein the proportion by weight (a)/(a)+(b) is 0.4 to 1, and (a)+(b):(c) is 3:1 to 1:2 and the pH of the composition is 6 to 8.5.