Theo Nash
3-methyl-1-butanol, also known as isoamyl alcohol, isopentyl alcohol, or isopentanol, is a primary alcohol with the chemical formula C5H12O. It is a volatile organic compound with a distinct apple brandy scent and a spicy taste. 3-methyl-1-butanol is naturally found in tea leaves, black tea, and green tea, as well as in products such as strawberries, peppermint, and eucalyptus oil. It has a variety of applications, including the preparation of synthetic flavors, use as a solvent in organic synthesis, and in the pharmaceutical industry.
| Characteristics | Values |
|---|---|
| Chemical Name | 3-Methyl-1-butanol |
| Other Names | Isoamyl alcohol, Isopentyl alcohol, Isobutylcarbinol, Isopentanol, Fusel oil, i-Amyl Alcohol, Isoamylol, 3-methylbutano, 3-methyl-butan-1-ol |
| Molecular Formula | C5H12O |
| Linear Formula | (CH3)2CHCH2CH2OH |
| CAS Number | 123-51-3 |
| Molecular Weight | 88.15 |
| Boiling Point | Not found |
| Physical Form | Colorless liquid with a mild, choking alcohol odor |
| Density | Less dense than water |
| Solubility | Practically insoluble in water but readily soluble in organic solvents such as methanol, ethanol, and ethyl acetate |
| Vapors | Poisonous and irritating |
| Uses | Preparation of synthetic fruit flavors, spices, pharmaceuticals, mineral processing agents, and solvents |
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What You'll Learn
3-Methyl-1-butanol is a primary alcohol
3-Methyl-1-butanol, also known as 3-methylbutanol, isobutylcarbinol, isoamyl alcohol, isopentanol, isopenty alcohol, isamylol, or fusel oil, is a primary alcohol. It is a hydrophobic molecule that is insoluble in water but soluble in organic solvents such as methanol, ethanol, and ethyl acetate. It is a colorless liquid with a mild, choking alcohol odor and a distinct apple brandy scent. It has a clear oily texture.
The chemical formula for 3-methyl-1-butanol is C5H12O, and its linear formula is (CH3)2CHCH2CH2OH. It is one of the components of the aroma of the black truffle and is also found in tea leaves, black tea, and green tea. It is naturally present in the form of esters in strawberries, peppermint, lemongrass, eucalyptus oil, rum, and other products.
In terms of its chemical structure, 3-methyl-1-butanol is an alcohol with the OH group on a carbon atom attached to only one other carbon atom, which defines it as a primary alcohol. It can be produced by 3-methylbutanal reductase from 3-methylbutanal. It is used as a solvent in organic synthesis, synthetic flavoring, pharmaceuticals, corrosion inhibitors, and the production of plastics and other chemicals.
The vapors of 3-methyl-1-butanol are poisonous and irritating, and it is considered a primary irritant without an allergic reaction. It also has antifungal properties and is used in DNA extraction protocols.
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It is a hydrophobic molecule
3-methyl-1-butanol, also known as Isoamyl alcohol, is a primary alcohol with the molecular formula C5H12O. It is a volatile organic compound and an alkyl alcohol. It is a clear, colourless liquid with a mild, choking alcohol odour and a spicy taste.
The hydrophobic nature of 3-methyl-1-butanol can be attributed to its chemical structure. The molecule contains a long carbon chain, which contributes to its hydrophobicity. Additionally, the presence of a methyl group may also contribute to its hydrophobic character, as methyl groups are commonly associated with hydrophobic properties in organic chemistry.
The hydrophobicity of 3-methyl-1-butanol has implications for its applications and behaviour. For example, its hydrophobic nature allows it to act as a foam suppressant by affecting the surface tension of micro-emulsions and causing foam breaking. This property is utilized in its application as an antifoaming agent in certain reagents.
Furthermore, the hydrophobic character of 3-methyl-1-butanol contributes to its potential as a biofuel. Its hydrophobic and branched structure resemble those of gasoline, making it a promising candidate for alternative fuel sources in internal combustion engines.
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It is used as a solvent
3-Methyl-1-butanol, also known as 3-methylbutanol, isoamyl alcohol, isobutylcarbinol, isopentanol, or isopentenol, is a primary alcohol with the chemical formula C5H12O. It is a colorless liquid with a mild, choking alcohol odor and a distinct apple brandy scent. Its vapors are irritating and poisonous. Due to its hydrophobic nature, it is practically insoluble in water but readily soluble in organic solvents such as methanol, ethanol, and ethyl acetate.
As a specialty solvent, 3-methyl-1-butanol has a diverse range of applications across various industries. One of its prominent uses is in the preparation of synthetic fruit flavors, such as apricot, banana, cherry, greengage, malt, orange, plum, and whiskey flavors. It is also used as a raw material in the production of synthetic banana oil, contributing to its distinctive aroma and taste.
In the pharmaceutical industry, 3-methyl-1-butanol serves as a solvent in organic synthesis, playing a role in the development of various drugs and medications. It is also utilized as a flotation agent and in the creation of plasticizers, synthetic lubricants, and corrosion inhibitors. Additionally, it finds application in the preparation of oil additives and the manufacturing of spices, pharmaceuticals, and mineral processing agents.
Outside the realm of flavors and pharmaceuticals, 3-methyl-1-butanol is employed as a solvent for oils, fats, resins, and waxes. It is further utilized in the plastics industry, particularly in spinning polyacrylonitrile, and in the production of lacquers and other chemicals. Its versatility as a solvent extends to its use in the determination of fat in milk and the analysis of iron, silicon, thorium, and fusel oil. It is also valuable in the complexation extraction of certain metals and the separation of lithium chloride from other alkali metal chlorides.
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It is found in tea leaves and black truffles
3-methyl-1-butanol, also known as 3-methylbutanol or isoamyl alcohol, is a primary alcohol. It is a natural component found in tea leaves, black tea, and green tea. It is a colorless to pale yellow liquid with a clear oily texture and a distinct apple brandy scent. The substance has a spicy taste, and its vapors are poisonous.
It is also one of the components of the aroma of the black truffle (Tuber melanosporum). Black truffles are highly valued for their aromatic properties, and their aroma can be passively transferred into food matrices. 3-methyl-1-butanol is among the key aromatic compounds of black truffles that can be transferred into food products such as milk, sunflower oil, grapeseed oil, and egg yolk. This passive transfer of the truffle aroma can occur within 24 hours, and the presence of 3-methyl-1-butanol contributes to the unique scent of these food items.
The substance is also found in over 230 natural sources, including various fruits, vegetables, spices, grains, and alcoholic beverages. It is a common fusel alcohol, produced as a major byproduct of ethanol fermentation. Due to its flavor and aroma, it is used in the production of synthetic flavors, fragrances, and banana oil.
In addition to its use in the food industry, 3-methyl-1-butanol has other applications. It is utilized as a solvent for oils and fats, as well as in organic synthesis, pharmaceutical manufacturing, and the creation of corrosion inhibitors. It is also used in DNA extraction protocols and exhibits antifungal properties. However, it is important to handle 3-methyl-1-butanol with caution as it can be toxic and irritating when inhaled or exposed to the skin and eyes.
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It has a pungent odour and repulsive taste
3-methyl-1-butanol, also known as 3-methylbutanol, isoamyl alcohol, isobutyl carbinol, isopentanol, and isopentylic alcohol, is a colourless liquid with a pungent odour and repulsive taste. It has a distinct apple brandy scent and a spicy taste. It is a natural component found as esters in various products such as strawberries, peppermint, lemongrass, eucalyptus oil, and rum, among others. It is also found in tea leaves, black tea, and green tea.
The vapours of this substance are poisonous and produce an irritating vapour. It is a specialty solvent that finds extensive use in flavours and fragrances and is used in the production of many synthetic flavours. 3-methyl-1-butanol is used as a solvent for oils, fats, resins, and waxes; in the plastics industry; and in manufacturing lacquers, chemicals, and pharmaceuticals. It is also used as a flavouring agent and in fragrances.
In terms of its chemical properties, 3-methyl-1-butanol is a hydrophobic molecule, practically insoluble in water but readily soluble in organic solvents such as methanol, ethanol, and ethyl acetate. It is one of several isomers of amyl alcohol (pentanol). It is a by-product of gut microbial fermentation and ethanol fermentation. It is also a common fusel alcohol.
Due to its flavour and aroma, 3-methyl-1-butanol is an ingredient in the production of banana oil, an ester found in nature and also produced as a flavouring in the food industry. It is also used as an antifoaming agent in the Chloroform: Isomyl Alcohol reagent.
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Frequently asked questions
Yes, 3-methyl-1-butanol (also known as isobutylcarbinol, isopentanol, or isoamyl alcohol) is a primary alcohol. It is a volatile organic compound and an alkyl alcohol.
A primary alcohol is a compound comprising an alcohol functional group, attached to a primary carbon. The general structure is RCOH (where R= alkyl, aryl).
3-methyl-1-butanol is found in tea leaves, black tea, and green tea. It is also a natural component found as esters in strawberries, peppermint, lemongrass, eucalyptus oil, and rum, among others.
