Isobutyl isobutyrate (CAS 97-85-8) is an ester compound with the chemical formula C₈H₁₆O₂. It appears as a clear, colorless liquid with a low boiling point of around 148°C. It is insoluble in water but miscible with organic solvents like ethanol, ether, and oils. Its structure consists of an isobutyl group (a branched four-carbon chain) and an isobutyrate group, making it volatile and chemically stable under normal conditions-key traits for its applications in fragrance and industrial settings.
What does isobutyl isobutyrate smell like?
It has a pleasant, fruity aroma, often described as sweet and apple-like, with hints of banana or pear. This fresh, mild scent makes it popular in fragrance formulations, as it adds a crisp, fruity note without being overpowering.
Is isobutyl isobutyrate organic?
Yes, it is an organic compound. It contains carbon, hydrogen, and oxygen atoms, with covalent bonds linking its molecular structure-hallmarks of organic chemistry. It is synthesized from organic precursors: isobutanol (an alcohol) and isobutyric acid (a carboxylic acid), further confirming its organic nature.
1. Fragrance and Flavor Industry
Its fruity scent makes it a common ingredient in perfumes, colognes, and body care products (like lotions and soaps). In the flavor industry, it is used to enhance the taste of food and beverages, adding apple, pear, or tropical fruit notes to candies, soft drinks, and baked goods. Its stability ensures the aroma and flavor remain consistent over time.
2. Solvent in Industrial Applications
Isobutyl isobutyrate acts as a solvent in coatings, paints, and inks. Its ability to dissolve resins and oils, combined with its low toxicity and mild odor, makes it suitable for water-based or low-VOC (volatile organic compound) formulations. It helps adjust the viscosity of these products, ensuring smooth application and quick drying.
3. Chemical Intermediate
Isobutyl isobutyrate serves as an intermediate in organic synthesis, particularly in producing more complex esters or pharmaceuticals. Its ester group can undergo reactions like hydrolysis or transesterification, allowing chemists to modify its structure for specific industrial or medicinal uses.
4. Aerosol and Cosmetic Products
In aerosols (like air fresheners or hair sprays), it helps disperse fragrance evenly and prevents clumping. In cosmetics, it is added to products like nail polishes and makeup removers to improve texture and aid in dissolving other ingredients, ensuring a smooth, easy-to-apply consistency.
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