Composition (C) comprising per 100% of its mass: from 0.5% to 30% of one or more alcohols of formula (iv): R1&mdash OH&emsp &emsp (iv) in which R1 represents an aliphatic radical having from 8 to 36 carbon atoms and from 70% to 99.5% of one or more compounds of formula (i): in which R represents an alkyl radical having from one to eight carbon atoms and n represents an integer greater than or equal to 1 and less than or equal to 10, R1 is as defined previously for formula (iv), at least one of the radicals Z1 or Z2 represents a radical: in which &mdash S&mdash represents the divalent residue of a reducing sugar and p represents a decimal number greater than or equal to 1 and less than or equal to 10 and the other one of the radicals Z1 or Z2 represents a hydrogen atom or said radical.
