![]() The main focus of this course is on inorganic lead toxicity. The symptoms and treatment are different from those of inorganic lead. Potential exposures to organic lead should be taken very seriously. Organic forms of lead are extremely dangerous, as they are absorbed through the skin and are highly toxic to the brain and central nervous system, much more so than inorganic lead.Įxposure to organic lead is generally limited to an occupational context. However, their use was phased out in the United States starting in the early 1970’s, and banned for use in gasoline for motor vehicles beginning January 1, 1996. The combustion of organic lead when it is added to gasoline as a fuel additive results in the release of lead into the atmosphere. Tetraethyl and tetramethyl lead is the form of lead used in leaded gasoline to increase octane rating. The color varies, depending on the chemical form, and the most common forms are white lead (a lead carbonate compound), yellow lead (lead chromate, lead monoxide) or red lead (lead tetraoxide). This is the form of lead found in higher lead content paint, soil, dust and various consumer products. Naturally occurring lead ores comprise 0.002% (15g/t) of the earth’s crust. It has a low melting point of 327.46 ☌ or 621.43 ☏. It is a bluish-grey metal that tarnishes easily in air to a dark grey. Lead has an atomic number of 82 and an atomic weight of 207.2. The chemical symbol for lead is Pb (from the Latin name plumbum). ![]()
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