The present invention relates to surfactant/solvent systems for liquid formulations comprising α) one or more nonaromatic-based surfactants, β) as solvent, one or more triester(s) of phosphoric acid with alcohols, preferably from the group consisting of 1) monohydric alkanols having 5 to 22 carbon atoms, for example with n-, i- or neo-pentanol, n-hexanol, n-octanol, 2-ethylhexanol, 2) diols or polyols, such as ethylene glycol, propylene glycol or glycerol, 3) aryl, alkylaryl, poly(alkyl)aryl and poly(arylalkyl)aryl alcohols, for example with phenol and/or cresol, octylphenol, nonylphenol, triisobutylphenol, tristyrylphenol, 4) alkoxylated alcohols obtained by reacting the alcohols mentioned above under 1), 2) or 3) with alkylene oxides, preferably (C1-C4)alkylene oxides, and 5) alkoxylated alcohols obtained by reacting monohydric alkanols having 1 to 4 carbon atoms and alkylene oxides. The surfactant/solvent system according to the invention is suitable for the preparation of liquid active substance formulations.