Description

Cis-3-hexenyl acetate is an organic compound used primarily as a fragrance and flavoring agent. It is an ester formed from cis-3-hexenal and acetic acid. This compound is recognized for its fresh, green, and fruity aroma, which is utilized in the formulation of perfumes, cosmetics, and food products.

Chemical Composition and Structure

The chemical composition of cis-3-hexenyl acetate includes:

Cis-3-Hexenal: The aldehyde component with a six-carbon chain (C6H10O) in the cis configuration, which imparts a green, leafy, and slightly fruity scent.
Acetic Acid: A two-carbon carboxylic acid (CH3COOH) that reacts with cis-3-hexenal to form cis-3-hexenyl acetate.

The structure of cis-3-hexenyl acetate is characterized by:

Ester Functional Group: Formed from the reaction between the hydroxyl group of acetic acid and the carbonyl group of cis-3-hexenal.
Molecular Formula: C8H14O2. The structure features a six-carbon chain (hexyl group) attached to an ester group (–COO–), giving it a distinctive fresh, green, and fruity aroma.

Physical Properties

Cis-3-hexenyl acetate typically appears as a clear, colorless to pale yellow liquid. It has a fresh, green, fruity, and slightly woody odor, reminiscent of freshly cut grass or green apples. The compound is soluble in alcohol and oils but insoluble in water. It has a moderate boiling point, making it suitable for use in various formulations.

Production Process

The production process for cis-3-hexenyl acetate involves:

Synthesis: Cis-3-hexenyl acetate is synthesized through esterification, where cis-3-hexenal reacts with acetic acid in the presence of an acid catalyst, such as sulfuric acid.
Distillation: The reaction mixture is distilled to separate cis-3-hexenyl acetate from other by-products and residual reactants.
Purification: Further purification is applied to remove any impurities, ensuring that the final product meets quality standards.
Formulation: The purified cis-3-hexenyl acetate is then used in various applications, including perfumes, flavorings, and cosmetics.

Applications

Cis-3-hexenyl acetate is utilized in:

Fragrances: Incorporated into perfumes and scented products for its fresh, green, and fruity scent.
Cosmetics: Added to personal care products to enhance their fragrance profile.
Flavorings: Used in food and beverage products to provide a green, fruity flavor.
Household Products: Employed in air fresheners and cleaning products for its pleasant aroma.

Safety

Cis-3-hexenyl acetate is generally regarded as safe for use in fragrances and flavorings when used in recommended concentrations. It should be handled according to safety guidelines to prevent any potential irritation.

Environmental and Safety Considerations

The production of cis-3-hexenyl acetate should follow environmentally responsible practices to minimize its impact. Efficient synthesis and purification methods are important to reduce waste. Proper handling and labeling are essential 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: 3681-71-8 EC number 222-960-1