Document b5NQEevOB64kbz8Qzj75ZoEm3

/ ^ Monsanto M O N (N*M| * V R. E. Keller - R&D Laboratories - South Second Street OATt uajcer NKPIMHCK TO June 30, 1970 CHLORINATED DIBENZOFURANS - PCB W. B. Papageorge General Offices cc H. S. Bergen - GO W. R. Richard - GO E. P. Wh;eler - GO M. W. Dietrich - Res. 2 E. M. Emery - Res. 2 * 3 l u <* ~ The attached letter and manuscript have been received from Dr. J. G. Vos at the University of Utrecht. It is in reply to our request for details of their work on the identifica tion of chlorinated dibenzofurans in PCB. Please note that this manuscript has been sent on a confidential basis and it is not for general distribution. We will attempt to provide chlorinated naphthalenes requested for gas chromatography work by Vos. 3ill Richard thinks we might be able to obtain these commercially. Dr. Emery is asked by copy of this memo to determine if we have any of these compounds in SRC. Drs. Dietrich and Emery are asked by copy of this memo to please review the manuscript and determine the difficulty of applying this technique to our Aroclor products. Assuming this is within our capabilities with a reasonable amount of effort, we will look at Aroclor products used at Bio-Test for feeding studies and compare results with those for current production grade materials. db Attachments - 2 R. E. Keller IN- IO * ( V II it NEV 3688