PRETESTING (')F COSMETICS 159 tization, occur. Under such circumstances, however, in the opinion of F. D. .4. the manufacturer could not successfully invoke Section 60Z(a) of the `4ct as a defense against such action. A prudent manufacturer will wish to know that his hair coloring, if it does not cause sensitivity, is free from any other toxic effects. What is the status of a hair coloring containing certified colors only combined with certain diluents? This product must be considered a color additive mixture which would be exempt from certification only if it con- tained those diluents which appear on a safe list. If this were not the case, then the product would require listing and an effective regulation following the demonstration of safety by appropriate tests. There are other combinations and formulations that raise complex questions under the present laws and regulations. An attempt has been made here to cite only a few examples of the situations in which exemption, listing and pretesting may be required. As indicated above, I have made clear that many of these problems will require discussion with F.D.A.'s ad- ministrative and scientific staffs to make certain that the conditions require testing and if so, to clarify and agree upon the kinds of tests and the experi- mental designs that will provide the necessary information for listing. (Received October 1, 1963)

160 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS IVth INTERNATIONAL CONGRESS ON SURFACE ACTIVE SUBSTANCES The Congress will be held in Brussels September 7-12, 1964. The works of the Congress are divided into three sections: Section •1: (subdivided into four groups) under the directorship of Professor Dr. Ing. F. Asinger (Germany): "Chemistry of Surface Active Substances," during which some 50 papers will be presented. Section B: (subdivided into six groups) under the directorship of Pro- fessor Dr. J. Th. Overbeek (Netherlands): "Physics of Surface Active Substances," during which about 150 papers will be presented. Section C: (subdivided into seven groups) under the directorship of Professor C. Paquot (France): "Use of Surface Active Substances," during which some 100 papers will be presented. Readers interested in the Congress may obtain Circular No. 3 and the final registration forms upon application to: General Secretariat of the IVth INTERNATIONAL CONGRESS ON SURFACE ACTIVE SUBSTANCES 49, Square Marie-I.ouise Brussels 4, Belgium