Salts of alkyl esters of sulfonated dicarboxylic acids and compositions containing same

A salt of a mono- and/or dialkyl ester of a sulfonated dicarboxylic acid is provided, where the dicarboxylic acid contains 4 to 8 carbon atoms and the alkyl groups are derived from 2-propylheptanol. A composition including (a) one or more salt(s) of a mono- and/or dialkyl ester(s) of a sulfonated dicarboxylic acid(s), where the dicarboxylic acid contains 4 to 8 carbon atoms and the alkyl groups are derived from 2-propylheptanol; and (b) one or more organic solvents liquid at 20° C. with a boiling point above 250° C. at 1 bar is also provided.