Document zQee768DGO0eXqk5BnbMzvkm

* IUIIIC1 TO icavioni E. S. Tucker - St. Louis Organic Research - Applied Sciences Section March 4, 1970 , : R. A. Lidgett Ruabon ' R . E . Keller - Rea. 1 W. R . Richard - G. O. H. A. Vodden - Ruabon M. W. Farrar - Res. 1 I W. B . Papageorge - Mas D . Danna - G. 0. Q . E . Thompson - G. O. ' ' - I am sending the following chlorinated diphenyl ethers to you for eventual incorporation into the biodegradability tests. These materials were prepared by Q. E. Thompson as potential fluid substitutes and Bill Richard has requested that we split samples. If you have any questions regarding these materials it would probably be best to contact Q. E. Thompson or Bill Richard. Sample No. Description St. L. 122001 Pure p-chlorodiphenyl ether St. L. 122016 (cut #6) (~93%) 3-chloro-4'chlorodiphenyl ether + ("*7%) trichioro isomers St. L. 122124 (cut #7) (~50%) 3-chloro-4'-chlorodiphenyl ether + (<~48%) trichioro iscrmers + (~2%) tetrachloro isomers. Pure o-chlorodiphenyl ether Pure m-chlorodiphenyl ether . St. L. 112946 Mixed dichlorodiphenyl ethers by direct chlorination of Ph^O "40% 2,4' ,*60% 4,4' St. L. 112946 di & trichlorodiphenyl ethers via direct chlorination " 59% dichlorodiphenyl ether "43% trichlorodiphenyl ether HONS 098662 . Page 2. In answer to an earlier question: Yes, the U.S. workers seem to report most materials found as 1254 k 1260. I also feel that this may be due to degradation of the lower chlorinated isomers through a food chain. E. S. Tucker Is MGNS 098663 J'