Chemical Warfare Service, placed the The first section appeared yesterday. lethal concentration of lead tetraethyl By DR.

(j For use as a motor fuel only CONTAINS LEAD (Tetraethyl) Kf 0009293

In other words, tetraethyl lead poisoning is different in its characteris tics from inorganic lead poisoning,and the clinical picture is so different, in fact, that the usual type of illness from the absorption of inorganic lead is not seen following absorption of tetraethyl lead.

However, I can cite you the reference as follows:"The Behavior of Lead in the Animal Organism II Tetraethyl Lead" by Kehoe and Thaaann, In the American Journal of Hygiene - Vol* 13. p.

KE 0009287 '00 For use as a motor fuel only CONTAINS LEAD (Tetraethyl) N9999.01

HE 0009287 '(b) For use as a m otor fuel only CON TAIN S LEAD (Tetraethyl) N9999.01

'Chronic - poisoning by'.tetraethyl lead, resembles the ordinary .and far more''.'.common chronic form of lead, poisoning from paint and-lead dusts, and. ia characterized by ->y ' *' .

The two points at which It seems to me trouble might well occur, have to do with possible volatility of tetraethyl lead in lubricating oil and the possibility of skin absorption of tetraethyl lead out of lubricating oil.

The two points at which it seems to me trouble might well occur, have to do with possible volatility of tetraethyl lead In lubricating oil and the possibility of shin absorption of tetraethyl lead out of lubricating oil.

Jims 7 15S39 Captain E, L Bergquist Station Hosptialj, Air Corps Advanced Plying 'cliool, Kelly field, Texas* Dear Captain Bergquistj I have your letter of June 3rd mid will endeavor `to answer your questions to the best of z t j ability, 1 ETHYL FLUID contains tetraethyl lead and aa organic iialxd (in the avaition fluid tit halid is thyXensdibroisi&* and the propcsrtion of tetraethyl lead to othylss0 -*ait.roaid is that theoretically required for complete Gosbinatlom to fora lead bromid)* in the ocaabustiaa* it is boliaved that the tetraethyl lead turns to lead oxide and the halids to acid* these tssr then combining to form lead halid*, This material is largely volatil-. ized opt of the cylinder itssif and is partially deposited in the exhaust system and partially 'blows ant with the exhaust gases - 2 There is no evident?

iodine required times 0.01617 equals the weight of tetraethyl lead in the sample.

The" distillations are carried out in such a teanner that there is no- possible exposure to the vapors of tetraethyl' lead* " Even the gasoline as a whole Is 'so well condensed in distillation studies than only the smallest fraction of it is lost, and under these condi tions the tetraethyl lead is very easily condensed.

The risk of oral absorption of tetraethyl lead is negligible, and the ingestion of gasoline containing tetraethyl lead is of no practical importance in relation to the lead compound, since one could not ingest enough lead by this means to produce illness without taking many times the lethal dose of gasoline. .

At the end of the reaction the product is separated from the reaction mixture and is entirely free from tetraethyl lead.

Uo attempt to recover tetraethyl lead from the process is contemplated.