Abstract: The invention relates to novel herbicidal compositions which comprise herbicidal active substances from the class of the phenoxyphenoxy- and heteroaryloxyphenoxy-carboxylic acid derivatives, a dispersant from the class of the fatty alcohol polyoxypropylene-polyoxyethylene ethers and/or the polyoxyethylene-polyoxypropylene block copolymers, emulsifier or wetting agent from the group comprising calcium dodecylbenzenesulfonate, fatty acid polyglycol esters, the ethoxylated nonylphenols and the alkanol polyglycol ethers, organic solvents and water, in the form of microemulsions which have low viscosity and are stable chemically and with regard to their technical properties in use.The invention furthermore relates to a process for preparing these microemulsions by stirring, shaking or static mixing. Prior to the biological application of these formulations, they are mixed with water and thus give spray mixtures which are perfect with regard to their technical properties in use.