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Tetraethyl lead: An anti-knock compound added to motor fuel. Also known as tetraethylplumbane, tetraethyl lead has highly adverse effects on human health.It causes lead poisoning.n 1927 the Surgeon General set a voluntary standard for the oil industry to follow in mixing tetraethyl lead with gasoline. This standard -- 3 cubic centimeters per gallon (cc/g) -- corresponded to the maximum then in use among refiners, and thus imposed no real restraint.
The lead inside the pencil is made from Graphite which is a natural form of carbon. The heavy metal Lead has never been used in pencils since its invention. If lead have been â¦ used instead of graphite the users of pencils may not be alive because lead and its compounds are very toxic.2 people found this useful.iamonds and pencil lead are made entirely of the element carbon (C, atomic # 6). Graphite is the correct term for pencil lead, which obviously isn't really lead. Diamond â¦ and graphite are allotropes, which means different atomic arrangements of the same element.