Kzpjfnai l eo nr r WBUcinon Joseph A, Costello, Vice President Ethyl Corporation Za 19& the tetraethyl lead industry consumed 1,202 tons of lead Hotel.

Of the compounds now employed in industry, tetraethyl lead is the only one that- poses a real problem in that regard

'tetraethyl lead, on the other hand, really is absorbed rapidly, as are also some other ?

Here a sufficient concentration of lead in the brain, in association with a history of exposure to tetraethyl lead, comes very near indeed to proof of fatal tetraethyl lead poisoning in the hands of a well informed person.

Tiie temperature s.t which TF..L. will preelpitsta rcm Vifeme for various con centrations is fiiven below* 3 cc tetraethyl lead per gnlloa below -50 C. (-58 F) 6 co tetraethyl lead per gulloa -44 C* (-47 F.) 9 eo tetraethyl lesd per gslloa 360 c. (-320 y,).

November 22, 1949 --CCH , 14 Inhalation of Tetraethyl Lead Fumes--Insufficient Evidence to Sustain Claim.

The absorption of tetraethyl lead has never been known to induce peripheral neuritis or paralysis of any other type.

I can say, with complete candor, that there is no better example of this in American industry than the performance of Ethyl Corporation in its safe guarding of the manufacture, distribution and use of tetraethyl lead.

Lee Sales of Commercially Pure TEL New York New York July 5 1956 In accordance with the request of the Sales Committee, I have reviewed the procedures for sales of commercially pure tetraethyl lead, dilute antiknock compounds and special fluids to non-refinery customers.

Lee Sales of Commercially Pure TEL New York New York July 5 1956 In accordance with the request of the Sales Committee, I have reviewed the procedures for sales of commercially pure tetraethyl lead, dilute antiknock compounds and special fluids to non-refinery customers.

Kettering Laboratory University of Cincinnati Eden and Bethesda Avenues Cincinnati 19, Ohio Dear Bob: Thanks mightily for your comment on the tetraethyl lead manuscript.

Lead arsenate ......................................

D RAK:ss Meth - Methods for Determining Lead in Air and in Biological Materials On the Toxicity of Tetraethyl Lead and Inorganic Lead Salts by R.A.K.

Thl3 is no surprise to me, and it will not surprise you, but it is of some con sequence to recognize that, following the absorption of significant quantities of tetraethyl lead from any source, or over any length of time, the concentration of lead in the blood undergoes little or no change, while the urinary lead concentration goes to high levels which vary with the severity of the exposure.

Thi. 3 Is no surprise to ns, and it will not surprise you, but It is of some con sequence to recognize that, following the absorption of significant quantities of tetraethyl lead from any source, or over any length of time, the concentration of lead in the blood undergoes little or no change, while the urinary lead concentration goes to high levels which vary with the severity of the exposure.