Document YGMm4xy1wq9X7YDd0bemxK99D

THEASSOCIATED ETHYL COMPANY LIMITED MEDICAL SERVICES ELLESMERE PORT, CHESHIRE H e a d O f f i c e : 20 BERKELEY SQ UARE, LONDON, W. I TELEPH O NE- ELLESM ER E PO RT 3611 T ELEX NO: 6 2 3 8 -4 TELEGRAMS: O C TE L, ELLESM ERE PORT, TELEX CABLES: O C TE L, ELLESM ERE PORT D r . P. S . I. B A R R Y Ch ic/ Medical Officer OUR REF. YOUR REF. Dear Dr. Kehoe, 27th March, 1961. v I enclose a copy of a letter that I received from a Dr. F;H. King, of the Occupational Health Unit in Wellington, New Zealand, in which he makes enquiry about the toxicity of a mixture of Tetraethyl Lead and methyl cyclopentadienyl manganese tricarbony, which I assume to be Ethyl Corporation's product, AK.33.X. As we have no direct knowledge of the toxic problem involved with this material, I have advised Dr. King that I am writing to you about it and will be most grateful if you could give to Dr. King the information that he seeks. Incidentally, some little while ago I wrote to you to ask your opinion of the method recommended by Ethyl Corporation for the disposal of sludge from tanks containing leaded gasoline,in which they advocate the spreading of the sludge in the open air and which they declare becomes virtually lead free after about one month's exposure. We have had one or two enquiries concerning this method of sludge disposal from oil refineries in this country, and I would be ve grateful for any views that you may have to offer on the subject. With kind regards, Yours sincerely, (VV M*~~j (P.S.I. Barry) ' Dr.R.A. Kehoe, The Kettering Laboratory, University of Cincinnati, College of Medicine, Eden Avenue, Cincinnati, 19, Ohio. Enc. PSIB/pby 0006361 Department of Health National Health Institute 52-62 Riddiford Street Wellington, New Zealand. Dr.P.S.I. Barry Chief Medical Officer, The Associated Ethyl Company Limited, Ellesmere Port., Che shire,England. 20th March, 1961. Dear Dr. Barry, . We have heard that the American Ethyl Corporation are marketing an improved anti knock additive which is a mixture of tetraethyl lead and methyl cyclopentadienyl manganese tricarbonyl. Is this mixture likely to come into general use? If it is possible that it will eventually turn up here, we should like to have some information on its toxic potential, if any. The actual manganese content may be too small to be significant but an organic Mn compound of this kind seems to call for a clearance from the toxicity point of view and any information you can give us will be grdatly appreciated. Yours sincerely, F.H. KING, M.D. Occupational Health Unit