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Joined: 13 May 2011
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PostPosted: Tue May 17, 2011 7:13 am    Post subject: Benzene Introduction Reply with quoteFind all posts by tutu0503

Benzene, also known as benzol, is a colorless liquid with a sweet odor. Benzene evaporates into air very quickly and dissolves slightly in water. Benzene is highly flammable. Most people can begin to smell benzene in air at 1.5-4.7 parts of benzene per million parts of air (ppm) and smell benzene in water at 2 ppm. Most people can begin to taste benzene in water at 0.5-4.5 ppm. One part per million is approximately equal to one drop in 40 gallons. Benzene is found in air, water, and soil. Benzene comes from both industrial and natural sources.Industrial Sources and Uses. Benzene was first discovered and isolated from coal tar in the 1800s. Today, benzene is made mostly from petroleum. Because of its wide use, benzene ranks in the top 20 in production volume for chemicals produced in the United States. Various industries use benzene to make other chemicals, such as styrene (for Styrofoam?and other plastics), cumene (for various resins), and cyclohexane (for nylon and synthetic fibers). Benzene is also used in the manufacturing of some types of rubbers, lubricants, dyes, detergents, drugs, and pesticides.Natural Sources.
Natural sources of benzene, which include gas emissions from volcanoes and forest fires, also contribute to the presence of benzene in the environment. benzene is also present in crude oil and gasoline and cigarette smoke. Benzene is commonly found in the environment. Industrial processes are the main sources of benzene in the environment. Benzene levels in the air can be elevated by emissions from burning coal and oil, benzene waste and storage operations, motor vehicle exhaust, and evaporation from gasoline service stations. Tobacco smoke is another source of benzene in air, particularly indoors. Industrial discharge, disposal of products containing benzene, and gasoline leaks from underground storage tanks release benzene into water and soil. Benzene can pass into air from water and soil surfaces. Once in the air, benzene reacts with other chemicals and breaks down within a few days. Benzene in the air can also be deposited on the ground by rain or snow.benzene in water and soil breaks down more slowly. Benzene is slightly soluble in water and can pass through the soil into underground water. Benzene in the environment does not build up in plants or animals.
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PostPosted: Wed Jun 08, 2011 4:42 am    Post subject: Reply with quoteFind all posts by gteuae

Great info! thumbs up! Smile
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Joined: 25 Sep 2017
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PostPosted: Mon Sep 25, 2017 5:04 am    Post subject: Reply with quoteFind all posts by gagepoon

Thanks for sharing useful piece of information on Benzene. To support the post sharing some information on chemical and molecular structure related to Benzene also an interesting article on "Benzene Is Everywhere - Don't Let It Zap Your Health" in which author state that Benzene is also present in crude oil, gas, diesel, etc. Benzene is also released in the smoke from forest fires. Some of our largest exposures to benzene come from petroleum products, such as our use of plastics, tobacco smoke and every time we fill up at the gas station.
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