What Is Eugenol Definition Structure Formula Uses and Preparation
Understanding The Concept Of Eugenol
Eugenol is a natural substance naturally occurring in scores of angiosperm plants, having a spicy tinge with a strong scent. Thus, the substance is well-known as aromatic photochemical. The phenolic compound is a very weak acid and is represented as C10H12O2. The chemical compound is a pale-yellow liquid and exhibits the antiseptic and antioxidant properties. In no small measure, the reduced phenylpropanoids is a significant ingredient in the clove oil. Eugenol compound is a homologous series which is found in sweet basil, lemon balm, nutmeg and cinnamon.
Eugenol Definition
Eugenol can be defined as a yellow, pale phenylpropanoid compound which has been derived from Guaiacol with an ally chain of a hydroxyl group. It has a corrosive chemical structure and has a wide range of medicinal properties to treat diseases. The scientific name of the chemical compound is 4-allyl-2-methoxyphenyl.
Chemical and Physical Properties of Eugenol
The molecular formula of Eugenol is C10H12O2 and its molecular weight is 164.21. The relative density of the bioactive compound is d2525 1.053~1.064 and is miscible in water, volatile oil, ether and chloroform.
The chemical compound is water-soluble and has a massive polar surface area. Eugenol has three rotatable chemical bond counts and acts as per rule of five. It belongs to the kingdom of organic compounds, and its class is phenols.
The chemical compound is soluble in water solvents as well as organic solvents. It can also be dissolved in ether, chloroform and alcohol. The melting point of Eugenol is -9.2 degrees Celsius, and the boiling point is 225 degrees Celsius. The natural additives have a great shelf life and thus have replaced the industrial synthetics.
The refractive index of the compound is nD20 1.538~1.542, and as soon as it gets in contact with the air, it tends to darken. Eugenol must be stored under 25 degrees Celsius and must not have any contact with light. The chemical compound has the chemical properties to turn the red litmus paper into the blue.
Preparation of Eugenol
In laboratories, Guaiacol is kept as the raw component to prepare the eugenol chemical compound. Since the method is synthetic, there are several disadvantages, and the shortcomings must be addressed. In the process of separation and purification, there are several side effects which cause to affect the quality of the compound.
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Once the chemical compound is ready, the Eugenol structure looks similar to the diagram.
Eugenol Uses
Eugenol is considered to be a non-mutagenic with anti-cancer properties and can also be used as an inhibitory compound to kill cancer cells. The potent inhibitor can also be used to treat oral diseases with its antibiotic properties.
Eugenol paste is also used in dentistry to keep pain at bay, relax the pulp and treat damaged gums. The smoky compound is also used with zinc oxide to use as fillings and dental prosthetics.
The proactive component helps to relieve oxidative stress, treat neural disorders, treat inflammation and hyperglycemia and elevate the levels of cholesterol in the body. Therapeutic potential of the phytogenic compound can be used to cure a plethora of diseases including, liver ailments, bronchitis, cancer, cardiovascular diseases, and diarrhoea.
The medicinal herb gateway has several pharma logical properties including, antimicrobial role, neuroprotective ability, anaesthetic activity, hypolipidemic efficiency and antioxidant potential. The spectrum of properties of the Eugenol also helps to tackle lifestyle-related diseases.
Due to the spicy scent, the compound is used in perfumes. A few mosquito repellent creams use this ingredient to repel insects, whereas several researchers use this compound to attract insects for their research studies. It is also used in lotions, bath soaps and oils and topical creams.
The chemical compound is mostly used in the pharmaceutical and toilet industry for manufacturing products including, mouthwash and toothpaste. The antiseptic compound has a significant effect in treating migraines and unbearable headaches.
The antispasmodic effect of Eugenol helps to get rid of mucus, cough, flu, bronchitis, asthma, colds, sinusitis and throat infections. It can also be used to treat itchy skin, travel sickness, inflammation, etc. Furthermore, the peppermint, like the taste of the chemical compound, when added to certain products helps to keep your mouth fresh at all times.
Did You Know?
Human bodies have been crafted to process Eugenol in small amounts even after having strong chemical components; thus, the body cannot handle overdose of the same.
FAQs on Eugenol Structure Properties and Chemical Reactions
1. What is eugenol in chemistry?
Eugenol is a naturally occurring phenolic compound with the molecular formula C10H12O2 that is mainly found in clove oil. Chemically, it is an allyl-substituted guaiacol (a methoxyphenol). Key features include:
- A phenolic –OH group
- A methoxy group (–OCH3)
- An allyl side chain (–CH2–CH=CH2)
2. What is the chemical structure of eugenol?
The chemical structure of eugenol consists of a benzene ring substituted with a hydroxyl group, a methoxy group, and an allyl chain. Its IUPAC name is 4-allyl-2-methoxyphenol. Structural characteristics include:
- Aromatic benzene ring
- Phenolic –OH at position 1
- –OCH3 at position 2 (ortho to –OH)
- –CH2–CH=CH2 at position 4
3. What functional groups are present in eugenol?
Eugenol contains three main functional groups: a phenol, an ether, and an alkene. Specifically:
- Phenolic hydroxyl (–OH) attached to an aromatic ring
- Methoxy ether (–OCH3)
- Alkene (C=C) in the allyl side chain
4. Is eugenol an acid or a base?
Eugenol is a weak acid because it contains a phenolic –OH group that can donate a proton. The acidity arises from:
- Formation of a resonance-stabilized phenoxide ion
- Electron-donating substituents that slightly influence acidity
5. What is the molar mass of eugenol?
The molar mass of eugenol (C10H12O2) is approximately 164.20 g mol-1. Calculation:
- C: 10 × 12.01 = 120.10 g mol-1
- H: 12 × 1.008 = 12.10 g mol-1
- O: 2 × 16.00 = 32.00 g mol-1
6. How is eugenol extracted from clove oil?
Eugenol is extracted from clove oil using steam distillation followed by acid–base extraction. The general steps are:
- Steam distillation to isolate essential oil
- Treatment with NaOH(aq) to form water-soluble sodium eugenolate
- Separation of aqueous layer
- Acidification with HCl(aq) to regenerate eugenol
7. What reactions does eugenol undergo in organic chemistry?
Eugenol undergoes reactions typical of phenols, alkenes, and aromatic compounds. Important reactions include:
- Electrophilic aromatic substitution (e.g., nitration, halogenation)
- Oxidation of the allyl side chain
- Addition reactions across the C=C double bond
- Esterification of the phenolic –OH group
8. What is the difference between eugenol and isoeugenol?
The main difference between eugenol and isoeugenol is the position of the double bond in the side chain.
- Eugenol: allyl group (–CH2–CH=CH2)
- Isoeugenol: propenyl group (–CH=CH–CH3) conjugated with the aromatic ring
9. Why is eugenol used in dentistry?
Eugenol is used in dentistry because it has analgesic and antiseptic properties and forms zinc eugenolate cements. It reacts with zinc oxide to form a chelate complex used in temporary fillings:
- Formation of zinc eugenolate
- Provides mild pain relief
- Acts as an antimicrobial agent
10. What are the physical properties of eugenol?
Eugenol is a pale yellow, aromatic liquid with moderate boiling point and low water solubility. Key physical properties include:
- Molecular formula: C10H12O2
- Molar mass: 164.20 g mol-1
- Boiling point: about 254°C
- Slightly soluble in water, soluble in organic solvents
