Document gQ4LDE0Y6yZZMg7qqqNKgDq

May 9, I960 Kr. 3. X Ball Tthyl Corporation 100 Park Avenue liew York 17, New York Dear Hank: I sensi herewith one copy of a brief summary of our toxicological observations of years ago on TML and the other alkyls, in order to comply with the request of C^l-Tex. I am reluctant to give wide circulation to this report, partly because the information is scanty, partly because it may not be as precise as I would wish, but largely because it does not contain the information which is required to answer the primary questions of industrial toxicology and hygiene that arise concerning TML. It should be recognized that this work was preliminary in nature and that it was discontinued summarily when the decision was made that Ethyl would not pursue its exploitation further at that time. I shall not refuse to supply this report to suitable people, but I don't want it to go beyond a very limited circle of medical people to whom I can explain its limitations. R'e are investigating TML further in the several aspects of its toxicology about which we need more Information, and I don't want anyone to take the present report very seriously or to believe that we regard it highly. I suggest, therefore, that little mention be made of its existence. Moreover, only a few copies of it remain. I can have others reproduced but I am not very keen to do so for the reasons expressed above. Incidentally, your letters concerning precaution and regulations for handling TML have not been ignored, although they may seem to have been. It does not appear to me that there need be much modification of those which now apply to TEL, at least so far as domestic activities go. Rather I should think it advisable to go over the present in structions carefully and to see what needs to be done to make them apply satisfactorily to all of the products in this field. Why don't you take a look at this first? Then we can get together for a joint look at them. With best regards. Sincerely, RAKiSS Robert A. Kehoe, M. D