Use of a composition represented by the formula: R 1 -O- p -H wherein G represents the residue of a reducing sugar, R 1 represents the n-heptyl radical, p represents a decimal number greater than 1, and less than or equal to 5, said composition consisting of a mixture of compounds represented by the formulas (I 1), (I 2), (I 3), (I 4) and (I 5): R 1 -O- 1 -H (I 1) R 1 -O- 2 -H (I 2) R 1 -O- 3 -H (I 3) R 1 -O- 4 -H (I 4) R 1 -O- 5 -H (I 5), in the following respective molar proportions: a 1 for the compound having formula (I 1), a 2 for the compound having formula (I 2), a 3 for the compound having formula (I 3), a 4 for the compound having formula (I 4) and a 5 for the compound having formula (I 5), such that: the sum a 1 + a 2 + a 3 + a 4 + a 5 is equal to 1 and that the sum a 1 + 2a 2 + 3a 3 + 4a 4 + 5a 5 is equal to p, as a solubilising agent of at least a non-ionic surfactant having formula: R-(O-CH(R')-CH 2) n -(O-CH 2 -CH 2) m -O-H wherein R represents a saturated or unsaturated, linear or branched, hydrocarbon aliphatic radial, comprising from 8 to 14 carbon atoms, R' represents a methyl or ethyl radical, n represents an integer greater than or equal to 0 and less than or equal to 15, m represents an integer greater than or equal to 0 and less than or equal to 15, it being understood that the sum n + m is greater than zero, in an aqueous acid composition. wherein G represents the residue of a reducing sugar, R 1 represents the n-heptyl radical, p represents a decimal number greater than 1, and less than or equal to 5, said composition consisting of a mixture of compounds represented by the formulas (I 1), (I 2), (I 3), (I 4) and (I 5): R 1 -O- 1 -H (I 1) R 1 -O- 2 -H (I 2) R 1 -O- 3 -H (I 3) R 1 -O- 4 -H (I 4) R 1 -O- 5 -H (I 5), in the following respective molar proportions: a 1 for the compound having formula (I 1), a 2 for the compound having formula (I 2), a 3 for the compound having formula (I 3), a 4 for the compound having formula (I 4) and a 5 for the compound having formula (I 5), a 1 for the compound having formula (I 1), a 2 for the compound having formula (I 2), a 3 for the compound having formula (I 3), a 4 for the compound having formula (I 4) and a 5 for the compound having formula (I 5), such that: the sum a 1 + a 2 + a 3 + a 4 + a 5 is equal to 1 and that the sum a 1 + 2a 2 + 3a 3 + 4a 4 + 5a 5 is equal to p, as a solubilising agent of at least a non-ionic surfactant having formula: R-(O-CH(R')-CH 2) n -(O-CH 2 -CH 2) m -O-H wherein R represents a saturated or unsaturated, linear or branched, hydrocarbon aliphatic radial, comprising from 8 to 14 carbon atoms, R' represents a methyl or ethyl radical, n represents an integer greater than or equal to 0 and less than or equal to 15, m represents an integer greater than or equal to 0 and less than or equal to 15, it being understood that the sum n + m is greater than zero, in an aqueous acid composition. the sum a 1 + a 2 + a 3 + a 4 + a 5 is equal to 1 and that the sum a 1 + 2a 2 + 3a 3 + 4a 4 + 5a 5 is equal to p, as a solubilising agent of at least a non-ionic surfactant having formula: R-(O-CH(R')-CH 2) n -(O-CH 2 -CH 2) m -O-H wherein R represents a saturated or unsaturated, linear or branched, hydrocarbon aliphatic radial, comprising from 8 to 14 carbon atoms, R' represents a methyl or ethyl radical, n represents an integer greater than or equal to 0 and less than or equal to 15, m represents an integer greater than or equal to 0 and less than or equal to 15, it being understood that the sum n + m is greater than zero, in an aqueous acid composition. wherein R represents a saturated or unsaturated, linear or branched, hydrocarbon aliphatic radial, comprising from 8 to 14 carbon atoms, R' represents a methyl or ethyl radical, n represents an integer greater than or equal to 0 and less than or equal to 15, m represents an integer greater than or equal to 0 and less than or equal to 15, it being understood that the sum n + m is greater than zero, in an aqueous acid composition.