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Isoamyl Acetate
Isoamyl acetate is an ester aroma component with a distinct banana and tropical fruit scent. Its aroma is lively and diffuses quickly, making it a key top note ingredient in fruit fragrances used to create an “instant recognition” effect.
Type
Fruity
The aroma is sweet and bright, a typical scent of ripe banana, accompanied by associations with tropical fruits such as pear and pineapple. The scent is light and direct, with a very high degree of recognizability and a strong initial impact.
Acquisition Methods
Natural extraction or chemical synthesis
It is naturally present in the aroma of fruits such as bananas and pears, but industrial applications are mainly synthetic. It is produced by esterification of isoamyl alcohol and acetic acid under catalytic conditions. The process is mature and suitable for large-scale stable production.
Basic Information
| English Name | Isoamyl Acetate |
| Common Industry Names | Isoamyl Acetate, Banana Oil |
| Chemical Category | Aliphatic Esters |
| Molecular Formula | C₇H₁₄O₂ |
| Molecular Weight | 130.19 g/mol |
| CAS Number | 123-92-2 |
| Appearance | Colorless transparent liquid |
Technical Data
| Boiling point | 142–143 °C |
| Melting point | −78 °C |
| Flash point | 25 °C |
| Density (20 °C) | Approx. 0.87 g/cm³ |
| Solubility | Easily soluble in ethanol, low solubility in water |
| Stability | Stable under neutral conditions, prone to hydrolysis under alkaline conditions, not suitable for long-term use in high pH systems. |
Chemical Structure
C₇H₁₄O₂
Fragrance Characteristics
| Aroma Characteristics | Sweet banana scent, strong tropical fruit notes, light and bright. |
| Fragrance Family Position | Top Note |
| Common Pairings | Ethyl Butyrate, Hexyl Acetate, Linalool, γ-Undecalactone, Vanillin |
| Applications | Food flavorings (candy, beverages, baking), daily chemical flavorings (personal care, cleaning products), home fragrances and toy fragrances |
Safety and Compliance
| IFRA Guidelines | Isoamyl Acetate is an ingredient permitted for use under IFRA, with relatively lenient restrictions. |
| Stability | Volatile, with a short aroma retention time; usually needs to be used in combination with fixatives or middle/base notes. |
| Allergy Risk | Low allergy risk; generally not on the EU’s list of high-risk allergenic fragrances. |
Application Highlights
- Highly recognizable, instantly establishing a fruity aroma.
- Cost-friendly, suitable for bulk orders and FMCG projects.
- Perfect for impactful top notes and an effective fragrance opening.
- Needs to be used in conjunction with middle and base notes to prevent the aroma from collapsing.
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