Lena Savoie
Ethanol, also known as ethyl alcohol, is a colourless liquid with a pungent taste and a distinct odour. It is a member of a class of organic compounds called alcohols and is widely used across various industries. Ethanol is the intoxicating ingredient in alcoholic beverages such as beer, wine, and spirits, and it is also employed as a solvent, in the synthesis of other chemicals, and as an additive to automotive gasoline. With the chemical formula CH3CH2OH, ethanol is produced through the fermentation of carbohydrates or the hydration of ethylene.
| Characteristics | Values |
|---|---|
| Other Names | Ethanol, Grain Alcohol, Drinking Alcohol, Alcohol |
| Chemical Formula | CH3CH2OH, C2H6O, EtOH |
| Colour | Colourless |
| Odour | Pleasant, Burning |
| Taste | Pungent, Burning |
| State | Liquid |
| Flammability | Flammable |
| Volatility | Volatile Organic Compound |
| Psychoactivity | Psychoactive Depressant |
| Toxicity | Toxic |
| Medical Applications | Antiseptic, Disinfectant, Antidote for Methanol Poisoning and Ethylene Glycol Poisoning |
| Use Cases | Chemical Solvent, Synthesis of Organic Compounds, Fuel Source, Additive to Gasoline |
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What You'll Learn
Ethanol is a psychoactive depressant
Ethanol, also known as ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol, is a psychoactive depressant. It is a clear, colourless liquid with a distinct pungent taste and a pleasant odour. It is the active ingredient in alcoholic beverages and is the second most consumed drug globally, after caffeine.
Ethanol is produced through the fermentation process of sugars by yeasts or petrochemical processes such as ethylene hydration. It has a chemical formula of CH3CH2OH, also written as C2H6O or EtOH, where Et represents the pseudoelement symbol for ethyl. The "eth-" prefix and the qualifier "ethyl" in ethyl alcohol were coined in 1834 by Justus Liebig, derived from the German name "Aether" for the compound C 2H 5−O−C 2H 5, commonly called "ether" in English.
As a depressant, ethanol acts on the central nervous system, impacting various neuronal pathways and leading to behavioural and biological alterations. Initially, ethanol consumption can induce an uplifting, stimulating effect due to the release of dopamine in the brain, resulting in feelings of pleasure, increased sociability, and heightened confidence. However, as consumption continues, ethanol's depressant effects become more pronounced, impairing cognitive and motor functions.
The impact of ethanol can vary among individuals, with some people experiencing the stimulant effects more prominently than others. The moment when ethanol transitions from a stimulant to a depressant may differ depending on the person. Additionally, the type of alcoholic beverage and its ethanol content can influence the effects experienced. For example, beers and wines typically have lower ethanol content, while spirits like whiskey, vodka, and rum have higher concentrations due to additional distillation.
Ethanol has a wide range of applications beyond its presence in alcoholic drinks. It is used as a topical antiseptic and disinfectant, a solvent in various industrial and laboratory processes, a fuel source for lamps, stoves, and internal combustion engines, and in the synthesis of numerous chemical compounds, including medicines, plastics, and explosives.
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Ethanol is highly flammable
Ethanol, also known as ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol, is a highly flammable liquid. It is an organic compound with the chemical formula CH3CH2OH, or C2H6O or EtOH, where Et is the pseudoelement symbol for ethyl.
Ethanol is a colourless liquid with a pungent taste and a strongly-smelling, volatile, flammable nature. It is highly flammable and should not be used around an open flame. The vapour can catch fire at 13 °C and is easily ignited by heat or sparks. When mixed with air, the vapour is explosive and can travel to the ignition point, spreading along the ground and collecting in compact areas. If containers of ethanol are heated, they may explode.
Ethanol is the oldest known sedative and has been used as an oral general anaesthetic during surgery in ancient Mesopotamia and medieval times. It is also the active ingredient in alcoholic beverages and is the second most consumed drug globally, after caffeine. Ethanol is also used in medical applications such as an antiseptic, disinfectant, solvent for some medications, and antidote for methanol poisoning.
In industrial contexts, it is important to follow safety guidelines when handling ethanol, including wearing protective clothing such as goggles, latex gloves, and laboratory coats, ensuring proper ventilation, and avoiding sources of heat, sparks, or fire. Ethanol is also used as a fuel source for lamps, stoves, and internal combustion engines.
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Ethanol is used as a solvent
The chemical compound ethanol is also referred to as ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol. It is a colourless, flammable liquid with a distinctive pleasant odour and a burning taste. It is a member of a class of organic compounds known as alcohols and has the chemical formula C2H5OH, or C2H6O.
In the pharmaceutical industry, ethanol is used as a solvent in the synthesis of organic compounds and medications. It is also employed as a solvent in medical drugs, perfumes, and vegetable essences such as vanilla. Additionally, ethanol serves as a solvent in the extraction of alkaloids from plant materials and in analytical chemistry procedures such as chromatography.
In laboratory and industrial applications, absolute ethanol is used as a solvent where water may react with other chemicals. Its low viscosity and transparency to UV light make it suitable for UV spectroscopy, where it does not interfere with the analysis of the sample. Ethanol is also used as a solvent in reverse-phase high-performance liquid chromatography (HPLC) as a mobile phase.
Furthermore, ethanol is utilised as a solvent in the production of paints, tinctures, markers, personal care products, and preservatives. It is particularly useful in the extraction of botanical oils, such as cannabis oil, where its low boiling point facilitates its removal from the solution after the extraction process.
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Ethanol is used in medical applications
Ethanol, also known as ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol, has various medical applications. It is a colourless liquid with a pungent taste and a pleasant odour.
Ethanol is used as an antiseptic in medical wipes and hand sanitizers for its bactericidal and anti-fungal effects. It is effective against most bacteria, fungi, and viruses. Ethanol is also used as a disinfectant and can be applied to surfaces for sterilization. It is an essential ingredient in disinfectants, particularly hand disinfectants, which the World Health Organization (WHO) has classified as indispensable.
In pharmaceutical production, ethanol is used as a carrier, preservative, and extraction agent for active ingredients, essential oils, and other substances that are not soluble in water. It is also used to dissolve many water-insoluble medications and related compounds. Ethanol is present as an antimicrobial preservative in over 700 liquid preparations of medicine, including acetaminophen, iron supplements, and cough medicine.
Additionally, ethanol is indispensable in the field of herbal medicines, as alcohol is crucial in the production of extracts. It also contributes to the stability, shelf life, and manufacturability of medicinal products. Ethanol has even emerged as a novel cancer therapy, providing an alternative to surgical interventions.
Ethanol is further used as an antidote to methanol and ethylene glycol poisoning. It is administered clinically to treat methanol and ethylene glycol toxicity.
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Ethanol is used as a fuel source
Ethanol, also known as ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol, is a clear, colourless liquid with a characteristic pleasant odour and a burning taste. It is a volatile, flammable organic compound with the chemical formula CH3CH2OH.
In the United States, 94% of ethanol is produced from corn grain, while Brazil, the world's second-largest consumer of fuel ethanol, uses sugarcane to produce ethanol. Ethanol-blended fuel is widely used in Brazil, the United States, Canada, and Europe. Most cars in the U.S. can run on blends of up to 15% ethanol, and some flexible-fuel vehicles can use up to 100% ethanol. Brazil has also made it mandatory to blend ethanol with gasoline since 1976, with the current legal blend being around 25% ethanol and 75% gasoline.
Ethanol is considered an eco-friendly alternative to gasoline as it produces fewer greenhouse gas emissions upon combustion due to more complete combustion, resulting in less toxic gases being emitted. It also has a positive energy balance, meaning that the process of producing ethanol fuel does not require more energy than the amount of energy contained in the fuel itself. Cellulosic ethanol, in particular, improves the energy balance and further reduces the amount of fossil fuel energy used in production.
In addition to its use in vehicles, ethanol is also used as a fuel source in lightweight rocket-racing aircraft and is being explored by Nissan for use in fuel cell vehicles.
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Frequently asked questions
Ethyl alcohol, also known as ethanol, is an organic compound with the chemical formula CH3CH2OH or C2H5OH. It is a volatile, flammable, colourless liquid with a pungent taste and a pleasant odour.
Ethyl alcohol is the intoxicating ingredient in alcoholic beverages such as beer, wine, and spirits. It is also used in pharmaceutical products, perfumes, cosmetics, household cleaners, polishes, disinfectants, insecticides, and as an industrial solvent for fats, oils, waxes, resins, and hydrocarbons.
Ethyl alcohol is produced through the fermentation of carbohydrates, where yeast ferments the sugars in grains, fruits, and vegetables. It can also be produced through the hydration of ethylene.
Exposure to ethyl alcohol can cause irritation to the eyes, skin, and nose, drowsiness, headache, mental excitement or depression, vomiting, flushing, and in high concentrations, loss of coordination, impaired perception, stupor, and coma. It is toxic and can affect the central nervous system, impairing coordination and judgment in larger amounts.
