Tetraethyl lead (TPP) is an organic lead compound used as an antiknock in fuel for internal combustion engines. TPP is part of the ethyl fluid added to gasoline (leaded gasoline). Ethyl liquid is a colorless oily liquid with an unpleasant odor, poorly soluble in water, good in organic solvents , boiling temperature 200 °. but volatility is very high, evaporates even at temperatures below 0 °, well absorbed by porous materials. It enters the body through the respiratory tract, gastrointestinal tract and intact skin. The toxic effect is associated with the action of the whole TES molecule and lead, which is released during the decomposition of the product in the body.
Tetraethyl lead is a strong neurotropic poison. Acute poisonings are characterized by severe headaches, hallucinations, impaired consciousness, abrupt psychomotor agitation, as well as changes in the autonomic nervous system (drooling, sweating, slowing the pulse and falling blood pressure). The severity of these symptoms depends on the severity of the poisoning. Possible death.
In chronic poisoning with tetraethyl lead, the same symptoms are observed as in acute, but less pronounced, the parasympathetic division of the autonomic nervous system is more affected. Symptoms characteristic of lead poisoning are not observed.
MPC TPP for industrial air 0.005 mg / m 3 .
Prevention : complete sealing of equipment containing thermal power plants, ventilation of rooms where work with thermal power plants takes place, the use of individual protective devices. Preliminary and periodic medical examinations of persons involved in the production of thermal power plants, 1 time in 3 months. The TPP is neutralized and degassed with kerosene, a solution of bleach (dry - it is impossible), active manganese dioxide, monochloramine and dichloramine, laundry soap.
First aid : if tetraethyl lead is swallowed - gastric lavage with 2% sodium bicarbonate solution, when contaminated with ethyl fluid, wash with kerosene and hot water and soap. Symptomatic treatment - intravenous glucose, barbiturates, insulin therapy. Contraindicated - bromides, morphine, chloral hydrate , scopolamine .