(57) A particulate foam control agent in finely divided form comprises a silicone antifoam. is wax free and comprises an organic material with a melting point in the range 50°C to 85'C. The organic material comprises a monoester of glycerol and certain fatty acids. These foam control agents have a good storage stability when incorporated in a powder detergent. A method of making such foam control agents comprises contacting the antifoam and the organic material in their liquid form and causing to form a solid in admixture, preferably onto a fluidised bed of carrier particles such as STPP.