Katerina Swanson
Benzene is a highly flammable, often colorless chemical that evaporates quickly at room temperature. It is a component of diesel fuel and gasoline and is among the twenty most utilized chemicals in the United States. Benzene exposure has been linked to various blood and bone marrow disorders, and it is classified as Carcinogenic to Humans by the World Health Organization. While fuel compositions vary, a typical composition of gasoline in 1989 included 0.5-2.5% benzene. Commercial fishers are exposed to benzene through unburned hydrocarbon vapors and combustion products in boat engine emissions.
| Characteristics | Values |
|---|---|
| Benzene Occurrence in Diesel Fuel | Benzene is a component of diesel fuel and gasoline. |
| Flammability | Benzene is highly flammable. |
| Physical State | Benzene is a colorless liquid at room temperature but evaporates quickly. |
| Origin | Benzene occurs naturally in crude oil. |
| Uses | Benzene is used as a base material in plastics, degreasers, solvents, lubricants, pesticides, rubbers, dyes, resins, and nylons. |
| Exposure | Benzene can be inhaled, ingested, absorbed through the skin, eyes, or through diesel exhaust. |
| Health Risks | Benzene exposure is associated with various blood and bone marrow disorders, including different types of leukemia and lymphomas. It is classified as "Carcinogenic to Humans" by the World Health Organization and other US health organizations. |
| Exposure Levels | Exposure levels vary depending on engine type and refueling. For example, predicted benzene exposure levels for commercial fishers using diesel engines were found to be 15.7 μg/m3. |
| VOC Composition | The composition of diesel fuel includes volatile organic compounds (VOCs) such as alkanes and aromatics, with lower concentrations of benzene compared to gasoline. |
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What You'll Learn
Benzene is a carcinogen
Benzene is a highly flammable, often colourless chemical that is liquid at room temperature but evaporates quickly. It is a component of petroleum products, including diesel fuel and gasoline. Benzene occurs naturally in crude oil and is often used as a base material in products like plastics, degreasers, solvents, lubricants, pesticides, rubbers, dyes, resins, and nylons. Due to its widespread use, benzene is among the twenty most utilized chemicals in the United States.
Benzene can be found in both the gas phase and the soot associated with diesel exhaust. It can be inhaled, ingested, or absorbed through the skin and eyes. Occupational exposure to benzene is a significant concern, especially for workers in industries such as railroads, petrochemicals, steel mills, and oil fields. Long-term exposure to benzene has been linked to genetic damage and various blood and bone marrow disorders, including acute myeloid leukemia and myelodysplastic syndrome.
Several organizations, including the World Health Organization (WHO), classify benzene as "carcinogenic to humans." In the United States, the Environmental Protection Agency (EPA), Centers for Disease Control and Prevention (CDC), Food and Drug Administration (FDA), and National Institutes of Health (NIH) all classify benzene as a known human carcinogen. There is no safe level of benzene exposure, and prolonged exposure can lead to serious health issues.
Studies have been conducted to measure personal exposure to benzene from fuel emissions, particularly among commercial fishers using different types of boat engines. The results indicate varying levels of benzene exposure depending on the engine type and refueling practices. While the specific composition of diesel fuel can vary, it typically contains lower concentrations of benzene compared to gasoline. However, the presence of benzene in diesel fuel and the potential for exposure during its use contribute to health risks, especially for individuals with prolonged or frequent exposure.
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Diesel fuel contains benzene
A typical composition of gasoline in the past included 0.5-2.5% benzene. Today, gasoline contains 9-36% aromatics, and while the benzene content has been reduced, it is still present. The presence of benzene in diesel fuel is a concern due to its classification as "Carcinogenic to Humans" by the World Health Organization. The Environmental Protection Agency (EPA), Centers for Disease Control and Prevention (CDC), Food and Drug Administration (FDA), and National Institutes of Health (NIH) in the United States all classify benzene as a "known human carcinogen."
Long-term exposure to benzene has been linked to various blood and bone marrow disorders, including acute myeloid leukemia (AML), myelodysplastic syndrome (MDS), acute lymphocytic leukemia (ALL), and chronic lymphocytic leukemia (CLL). Multiple myeloma, non-Hodgkin's lymphoma, and aplastic anemia are also associated with benzene exposure. There is no safe level of benzene exposure, and occupational diseases among workers exposed to diesel fuel and its vapors have been reported.
Studies have been conducted to measure personal exposure to benzene among commercial fishers using different types of boat engines. The results showed that diesel engines emitted lower levels of benzene compared to carbureted two-stroke and four-stroke engines. However, the presence of benzene in diesel fuel emissions highlights the potential health risks associated with exposure to diesel exhaust.
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Benzene is a natural component of crude oil
Benzene is a highly flammable, often colourless chemical that evaporates quickly at room temperature. It is a natural component of crude oil and a major industrial chemical. It is derived from natural gas, crude oil, or coal and is used as a feedstock to make other chemicals.
Benzene is an organic chemical compound with the molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar hexagonal ring, with one hydrogen atom attached to each. It is a volatile organic compound and a cyclic continuous pi bond between the carbon atoms classifies benzene as an aromatic hydrocarbon. Benzene is partially responsible for the aroma of gasoline.
It is a natural constituent of petroleum and is one of the elementary petrochemicals. It is used as a precursor to the manufacture of chemicals with more complex structures, such as ethylbenzene and cumene. Although billions of kilograms of these chemicals are produced annually, benzene finds limited use in consumer items because of its toxicity.
Benzene is a component of petroleum products including diesel fuel and gasoline. It is among the twenty most utilized chemicals in the United States. It is often used as a base material in products like plastics, degreasers, solvents, lubricants, pesticides, rubbers, dyes, resins, and nylons. Benzene can be found in both the gas phase and the soot associated with diesel exhaust.
The U.S. Environmental Protection Agency (EPA) has set limits on the amount of benzene that can be released into the environment from industrial and commercial sources, including the amount that can be used in gasoline. The EPA has set a maximum contaminant level (MCL) for benzene of 5 parts per billion in drinking water.
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Benzene exposure causes health issues
Benzene is a highly flammable, often colourless chemical that evaporates quickly at room temperature. It is a component of diesel fuel and gasoline and is among the twenty most utilised chemicals in the United States. Benzene exposure can occur through inhalation, ingestion, or skin and eye contact. While the specific amount of benzene in diesel fuel is unclear, it is known to be present and poses health risks, especially with long-term exposure.
Long-term exposure to benzene, even in small amounts, can cause significant health issues. It can lead to excessive bleeding, a weakened immune system, and anemia. Benzene exposure can also impact fertility and cause irregular menstrual cycles in women. One of the most concerning health issues associated with benzene exposure is its carcinogenic nature. The World Health Organization, the International Agency for Research on Cancer, and various US government agencies classify benzene as "carcinogenic to humans."
The bone marrow, where new blood cells are produced, is particularly vulnerable to the toxic effects of benzene. Benzene exposure can cause bone marrow cells to stop producing red blood cells, leading to anemia, or it can affect the production of white blood cells, compromising the immune system. This disruption in blood cell production can also increase the risk of blood cancers, such as leukemia and lymphoma. Several studies have found a link between benzene exposure and specific types of leukemia, including acute myeloid leukemia (AML), acute lymphocytic leukemia (ALL), and chronic lymphocytic leukemia (CLL).
In addition to the long-term effects, short-term exposure to high levels of benzene can also cause health issues. Inhalation of high doses of benzene can affect the nervous system, resulting in symptoms such as drowsiness, dizziness, headaches, tremors, confusion, and even unconsciousness. Consuming foods or drinks contaminated with high levels of benzene can cause vomiting, stomach irritation, dizziness, sleepiness, convulsions, and a rapid heart rate. Direct contact with benzene liquid or vapour can irritate the skin, eyes, and throat, causing redness and blisters on the skin.
It is important to note that the severity of benzene poisoning is related to the amount and duration of exposure, as well as individual factors such as pre-existing medical conditions and age. While there are regulations in place to limit benzene exposure, it is essential to take immediate action if exposed and seek professional medical assistance.
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Benzene is a base material in many products
Benzene is a highly flammable, often colourless chemical that is liquid at room temperature but evaporates quickly. It occurs naturally in crude oil and is a component of petroleum products, including diesel fuel and gasoline.
Benzene is among the twenty most utilised chemicals in the United States. It is often used as a base material in products like plastics, degreasers, solvents, lubricants, pesticides, rubbers, dyes, resins, and nylons. It is also a building block chemical, reacted with other chemicals to produce a variety of materials and, ultimately, consumer goods.
Some well-known brands that contained benzene include Liquid Wrench, Naptha, Gumout, and Ortho Weed-B-Gone. Benzene was historically used as a significant component in many consumer products, such as liquid wrench, several paint strippers, rubber cements, spot removers, and other products. Manufacture of some of these benzene-containing formulations ceased around 1950, although Liquid Wrench continued to contain significant amounts of benzene until the late 1970s.
Benzene is also a byproduct of the incomplete combustion of many materials. It can be found in both the gas phase and the soot associated with diesel exhaust. Benzene can be inhaled, ingested, or absorbed through the skin and eyes. If you have spent years working around diesel fuel, vapours, and exhaust, you have likely been exposed to benzene. Through the years, railroad workers have suffered benzene exposure through the use of mineral spirits, solvents, degreasers, and diesel exposure.
There is no safe level of benzene exposure. Long-term exposure to benzene causes effects on the bone marrow and can cause anaemia and leukemia. Most people in developed countries have measurable baseline levels of benzene and other aromatic petroleum hydrocarbons in their blood.
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Frequently asked questions
Benzene is a chemical compound that occurs naturally in crude oil and is present in diesel fuel and gasoline. The exact amount of benzene in diesel fuel is not publicly available but it is known to be lower than that in gasoline.
Benzene is a highly flammable, often colorless chemical that, at room temperature, is liquid but evaporates quickly. Benzene is among the twenty most utilized chemicals in the United States and is often used as a base material in products like plastics, degreasers, solvents, lubricants, pesticides, rubbers, dyes, resins, and nylons.
Yes, benzene is harmful. It can be inhaled, ingested, or absorbed through the skin and eyes. The World Health Organization classifies benzene as "Carcinogenic to Humans". Long-term exposure to benzene has been linked to various blood and bone marrow disorders including Acute Myeloid Leukemia (AML), Myelodysplastic Syndrome (MDS), Acute Lymphocytic Leukemia (ALL), and Chronic Lymphocytic Leukemia (CLL).
Commercial fishers, railroad workers, and people who work around diesel fuel, vapors, and exhaust are at risk of exposure to benzene.
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