Description

Ethyl 2-methyl butyrate is an ester derived from the reaction of 2-methyl butyric acid and ethanol. This compound is known for its fruity, sweet aroma reminiscent of apples and pineapples. It is commonly used as a flavoring agent in food products, as well as a fragrance component in cosmetics and perfumes. Its pleasant and fruity scent makes it valuable in the creation of various sensory experiences in consumer products.

Chemical Composition and Structure

The chemical composition of ethyl 2-methyl butyrate includes:

2-Methyl Butyric Acid: A branched-chain fatty acid with the molecular formula C5H10O2.
Ethanol: An alcohol with the molecular formula C2H5OH, used to form the ester bond.

The structure of ethyl 2-methyl butyrate is characterized by:

Ester Bond: Formed between the carboxyl group of 2-methyl butyric acid and the hydroxyl group of ethanol.
Molecular Formula: C7H14O2. The structure includes an ethyl group (–C2H5) attached to the ester linkage, along with the 2-methyl butyrate moiety.
Structure: CH3-CH(CH3)-CH2-COO-CH2-CH3. This structure results in a fruity and sweet aroma due to the ester bond linking the acid and alcohol components.

Physical Properties

Ethyl 2-methyl butyrate is typically a clear, colorless liquid. It has a fruity, sweet odor similar to apples and pineapples. Its physical properties include:

Boiling Point: Approximately 174°C (345°F).
Melting Point: Not typically observed as it remains liquid at standard temperatures.
Solubility: It is soluble in organic solvents such as ethanol and oils, but has limited solubility in water.

Production Process

The production process for ethyl 2-methyl butyrate involves:

Synthesis: The esterification reaction is carried out by reacting 2-methyl butyric acid with ethanol in the presence of an acid catalyst, usually sulfuric acid.
Reaction Conditions: The reaction mixture is typically heated to accelerate the formation of the ester bond.
Purification: After the reaction, the mixture is purified using distillation to separate ethyl 2-methyl butyrate from unreacted materials and by-products.
Characterization: The purified compound is characterized using analytical techniques to ensure its purity and confirm its structure.

Applications

Ethyl 2-methyl butyrate is used in:

Food Industry: As a flavoring agent in a variety of food products, providing a fruity, sweet taste.
Beverages: Incorporated into drinks to impart a pleasant fruit-like flavor.
Fragrances: Used in perfumes and scented products to create fruity, sweet notes.
Cosmetics: Added to personal care products for its pleasant aroma.

Safety

Ethyl 2-methyl butyrate is generally considered safe for use in food, beverages, and cosmetics when used in recommended concentrations. It should be handled with care, avoiding ingestion or inhalation of large quantities. Proper storage and handling are essential to maintain safety and quality.

Environmental and Safety Considerations

The production of ethyl 2-methyl butyrate should follow environmentally responsible practices to minimize its impact. Efficient synthesis and purification processes should be used to reduce waste. Proper labeling and handling are important to ensure safe use in its various applications.

INCI


Perfuming. Unlike fragrance, which can also contain slightly less pleasant or characteristic odours, the term perfume indicates only very pleasant fragrances. Used for perfumes and aromatic raw materials.
Synonyms:

CAS: