Disclosed is a composition comprising, substantially consisting of or consisting of: - at least 30% of DMSO; and - at least 20% of a fatty acid methyl ester or a mixture of said type of esters, the fatty acid containing 6 to 10 carbon atoms, the percentages being in percent by weight in relation to the total weight of the composition. The invention also relates to the use of a composition of said type as a cleaning agent and/or dispersion and to a method for synthesizing said composition.Une composition comprenant, consistant essentiellement ou consistant en : - au moins 30% de DMSO, et - au moins 20% d'un ester méthylique d'acide gras ou d'un mélange de tels esters, ledit acide gras ayant de 6 à 10 atomes de carbones, ces pourcentages étant en masse de la masse totale de la composition. L'invention porte également sur l'utilisation d'une telle composition en tant qu'agent nettoyant et/ou de dispersion ainsi que sur un procédé de fabrication de ladite composition.