Vivian Marlowe
Tert-butyl alcohol (TBA) is a tertiary alcohol with the formula (CH3)3COH. It is a colourless solid with a camphor-like odour and has a wide range of applications, including as a solvent, a denaturant for ethanol, and in the production of perfumes and gasoline. Given its diverse functionality and industrial usage, it is important to regularly retest tert-butyl alcohol to ensure its chemical properties remain consistent and to safeguard against potential health risks. The US Environmental Protection Agency (EPA) has conducted toxicological reviews of tert-butyl alcohol to assess its potential impact on human health, highlighting the necessity of ongoing reevaluation and testing of this compound.
| Characteristics | Values |
|---|---|
| Formula | (CH3)3COH |
| Other Names | t-BuOH, Tert-Butanol, TBA |
| Appearance | Colourless solid |
| Odor | Camphor-like |
| Miscibility | Miscible with water, ethanol, and diethyl ether |
| Sources | Beer, chickpeas, cassava, isobutane, propylene oxide production |
| Synthesis | Reaction of hydroquinone with isobutylene or tert-butyl alcohol |
| Reactions | Forms tert-butyl chloride when reacted with hydrogen chloride; forms tert-butyl hypochlorite with hypochlorous acid; reacts with Lucas reagent to form tertiary carbocation |
| Uses | Solvent, denaturant, flotation agents, fruit essences, perfumes, octane booster, dehydrating agent, chemical intermediate |
| Toxicity | Limited data on pharmacology and toxicology in humans and animals; potential cancer and noncancer health effects |
Explore related products
What You'll Learn
Tert-butyl alcohol's resistance to oxidation
Tert-butyl alcohol, also known as tert-butanol, is a tertiary alcohol with the formula (CH3)3COH. Unlike other isomers of butanol, tert-butyl alcohol does not have a hydrogen atom next to the hydroxy group. This structural difference makes it resistant to oxidation to carbonyl compounds. In other words, it does not undergo the typical oxidation reaction that primary and secondary alcohols experience.
The resistance of tert-butyl alcohol to oxidation is due to the absence of a hydrogen atom adjacent to the hydroxy group. In primary and secondary alcohols, this hydrogen atom is available for reaction, leading to the formation of aldehydes or ketones, respectively. However, in tert-butyl alcohol, the absence of this hydrogen atom prevents the oxidation reaction from occurring.
While tert-butyl alcohol is generally resistant to oxidation, there have been reports of reactions occurring under certain conditions. For example, in a laboratory setting, combining tert-butyl alcohol with potassium permanganate and sulfuric acid (H2SO4) resulted in a visible reaction, turning the solution orange. It is important to note that the presence of sulfuric acid played a crucial role in this reaction, as it reacted with the alcohol to generate an alkene, which then underwent oxidation. This suggests that the oxidation of tert-butyl alcohol may be possible under specific circumstances or with certain reagents.
Additionally, it is worth mentioning that tertiary alcohols, in general, can undergo oxidation if they possess an allylic structure. In such cases, an allylic shift can occur, allowing for subsequent oxidation of the alcohol. However, this is not a typical oxidation reaction and requires specific conditions or reagents, such as Bobbitt's reagent, which is similar to TEMPO used in many oxidations.
The resistance of tert-butyl alcohol to oxidation is an important property that distinguishes it from other alcohols. This unique characteristic is due to its molecular structure, specifically the absence of a hydrogen atom next to the hydroxy group. While there may be exceptions or specific conditions under which oxidation can occur, it is generally considered resistant to oxidation reactions.
Alcohol's Impact: Behavior, Personality, and Face Changes
You may want to see also
Explore related products
Tert-butyl chloride formation
Tert-butyl alcohol (TBA) is a tertiary alcohol with the formula (CH3)3COH. It is a colourless solid with a camphor-like odour and is miscible with water, ethanol, and diethyl ether. Tert-butyl alcohol has a variety of applications, including its use as a co-solvent in the formation of clear isotropic monophasic solutions and as a precursor in the synthesis of other organic compounds.
One important aspect of tert-butyl alcohol is its reactivity, particularly its resistance to oxidation due to the absence of a hydrogen atom next to the hydroxy group. However, when allylic, tertiary alcohols can undergo oxidation through an allylic shift mechanism, as observed with Bobbitt's reagent. Additionally, tert-butyl alcohol can undergo deprotonation with a strong base to form the tert-butoxide, a strong non-nucleophilic base commonly used in organic chemistry.
Now, let's focus on tert-butyl chloride formation:
Tert-butyl chloride is an organochloride compound with the formula (CH3)3CCl. It is a colourless, flammable liquid that is sparingly soluble in water. The formation of tert-butyl chloride is a crucial process in the synthesis of various organic compounds. Tert-butyl chloride is produced through the reaction of tert-butyl alcohol with hydrogen chloride, which follows an SN1 mechanism due to the stability of the tertiary carbocation formed. This reaction is typically carried out in a laboratory setting using concentrated hydrochloric acid.
The reactivity of tert-butyl chloride is also noteworthy. When dissolved in water, tert-butyl chloride undergoes hydrolysis to revert to tert-butyl alcohol. On the other hand, dissolving tert-butyl chloride in alcohols leads to the formation of the corresponding t-butyl ethers. Additionally, tert-butyl chloride finds application in the preparation of certain compounds, such as the antioxidant tert-butylphenol and the fragrance neohexyl chloride.
In summary, tert-butyl chloride formation involves the reaction of tert-butyl alcohol with hydrogen chloride, resulting in a colourless, flammable liquid with various industrial applications. The unique reactivity of both tert-butyl alcohol and tert-butyl chloride, influenced by their chemical structures, contributes to their significant roles in organic chemistry and synthesis.
Why You Should Wipe Ducts With Alcohol
You may want to see also
Explore related products
Tert-butyl alcohol's solubility
Tert-butyl alcohol, also known as tert-butanol, is a tertiary alcohol with the formula (CH3)3COH (or t-BuOH). It is a colourless solid with a camphor-like odour, and it melts near room temperature. Tert-butyl alcohol is soluble in water, ethanol, and diethyl ether. It is also found in certain natural products like beer, chickpeas, and cassava.
The solubility of tert-butyl alcohol in water is due to the formation of hydrogen bonds between the hydroxyl group of the alcohol and the water molecules. Tert-butyl alcohol is able to form these hydrogen bonds with water because it has a hydroxyl group (-OH) that can interact with the water molecules. This hydroxyl group also makes tert-butyl alcohol a tertiary alcohol, which means it has no hydrogen atom next to the hydroxyl group, making it resistant to oxidation to carbonyl compounds.
The solubility of tert-butyl alcohol in ethanol and diethyl ether is likely due to similar mechanisms of hydrogen bonding or dipole-dipole interactions. Ethanol, also known as ethyl alcohol, has a hydroxyl group that can form hydrogen bonds with the hydroxyl group of tert-butyl alcohol. Diethyl ether, on the other hand, has ether groups that can interact with the hydroxyl group of tert-butyl alcohol through dipole-dipole forces.
The purification of tert-butyl alcohol cannot be performed by simple distillation due to the formation of an azeotrope with water. However, initial drying of the solvent containing large amounts of water can be achieved by adding benzene to form a tertiary azeotrope, allowing the water to be distilled off. This process is important to ensure the purity and solubility characteristics of tert-butyl alcohol.
Tert-butyl alcohol is also used in various applications where its solubility is important. For example, it is used as a solvent for paints, lacquers, varnishes, and natural and synthetic resins. It is also used in the manufacture of artificial leather, safety glass, and plastic cements. In pharmaceutical applications, tert-butyl alcohol is used as an intermediate in the synthesis of drugs and chemicals, as well as for chemical extraction.
Alcohol or Hydrogen Peroxide: Which Heals Cuts Better?
You may want to see also
Explore related products
Tert-butyl alcohol's synthesis
Tert-butyl alcohol, also known as tert-butanol, is a tertiary alcohol with the formula (CH3)3COH. It is a colourless solid with a camphor-like odour and is miscible with water, ethanol and diethyl ether. Tert-butyl alcohol is derived commercially as a coproduct of propylene oxide production from isobutane. It can also be produced by the catalytic hydration of isobutylene or by a Grignard reaction between acetone and methylmagnesium chloride.
The synthesis of tert-butyl alcohol cannot be performed by simple distillation due to the formation of an azeotrope with water. However, initial drying of the solvent containing large amounts of water can be achieved by adding benzene to form a tertiary azeotrope, followed by distilling off the water. Smaller amounts of water can be removed by drying with calcium oxide (CaO), potassium carbonate (K2CO3), calcium sulfate (CaSO4), or magnesium sulfate (MgSO4), followed by fractional distillation. Anhydrous tert-butyl alcohol can be obtained by further refluxing and distilling from magnesium activated with iodine or alkali metals such as sodium or potassium.
Alternative methods for obtaining anhydrous tert-butyl alcohol include the use of 4 Å molecular sieves, aluminium tert-butylate, calcium hydride (CaH2), or fractional crystallization under an inert atmosphere. Tert-butyl alcohol is an important chemical intermediate used in various industrial applications. It is used to produce methyl tert-butyl ether (MTBE) and ethyl tert-butyl ether (ETBE) by reacting with methanol and ethanol, respectively. Additionally, it is used in the synthesis of tert-butyl hydroperoxide (TBHP) through a reaction with hydrogen peroxide.
Tertiary butyl-hydroquinone (TBHQ) synthesis, a type of antioxidant, involves reacting hydroquinone with either tert-butyl alcohol or isobutylene in the presence of a Friedel-Crafts catalyst. This reaction is typically carried out by mixing 0.6 moles (66 g) of hydroquinone and 240 mL of phosphoric acid in a toluene solvent. Tert-butanol (0.6 moles, 60 mL) is then added to the solution over 1-2 hours at a temperature of 110°C. The reaction mixture is stirred for an additional hour at the same temperature until the layer of phosphoric acid separates, and it is then cooled to obtain a solid substance. The solid is further purified with toluene and dioxane, and the desired product is tert-butyl hydroquinone.
United Airlines: Free Alcohol on International Flights?
You may want to see also
Explore related products
Tert-butyl alcohol's toxicity
Tert-butyl alcohol, also known as tert-butanol, is a tertiary alcohol with the formula (CH3)3COH. It is a colourless solid with a camphor-like odour and is derived commercially from isobutane as a coproduct of propylene oxide production. Tert-butyl alcohol is an important intermediate in industrial chemical synthesis, particularly in the production of fuel oxygenates.
Human exposure to tert-butyl alcohol may occur following fuel oxygenate metabolism or biodegradation. It is poorly absorbed through the skin but is rapidly absorbed upon inhalation or ingestion and distributed to tissues throughout the body. Elimination from the blood is slower and the half-life increases with dosage. It is largely metabolised by oxidation via 2-methyl-1,2-propanediol to 2-hydroxyisobutyrate, the dominant urinary metabolites.
The single-dose systemic toxicity of tert-butyl alcohol is low, but it is an irritant to the skin and eyes. High oral doses can produce ataxia and hypoactivity, and repeated exposure can induce dependence. Tert-butyl alcohol is not a genotoxin and has no effects on reproduction or development; developmental delays occurred only with marked maternal toxicity.
Studies in male rats and mice have shown that the target organs for toxicity are the kidneys and urinary bladder, particularly in males. Increased tumour incidences were observed, including renal tubule cell adenomas in male rats and thyroid follicular cell adenomas in female mice. However, neither of these modes of action can occur in humans. There is limited data on the pharmacology and toxicology of tert-butyl alcohol in humans and other animals.
Alcoholic Cirrhosis: What's the Truth?
You may want to see also
Frequently asked questions
Tert-butyl alcohol, or TBA, is a compound with a variety of applications, from perfumes to ethanol denaturants. It is important to retest tert-butyl alcohol as it is released into the environment through various waste streams due to its industrial production.
Tert-butyl alcohol has been assessed by the EPA for its potential cancer and noncancer health effects on humans. There is limited data on its pharmacology and toxicology in humans and other animals.
Tert-butyl alcohol is a tertiary alcohol and can be distinguished by Lucas reagent (ZnCl2/HCl). It reacts with the reagent instantly to form a very stable tertiary carbocation.
Tert-butyl alcohol is synthesized by reacting hydroquinone with either tert-butyl alcohol or isobutylene. This reaction takes place in the presence of a Friedel-Crafts catalyst.
