2-Ethylbutyric Acid (CAS: 88-09-5) – a branched-chain carboxylic acid with distinctive fruity, sweet, and slightly rancid aroma

2-Ethylbutyric Acid (CAS: 88-09-5) is a high-purity branched-chain carboxylic acid widely recognized for its distinctive and versatile olfactory profile. This compound exhibits a complex aroma characterized by sweet, fruity, and slightly rancid notes, with undertones reminiscent of pineapple, apple, apricot, and dairy products. These sensory properties make it a valuable ingredient in the development of authentic fruit flavors, dairy profiles, and complex fragrance compositions.

With a molecular formula of C₆H₁₂O₂, 2-Ethylbutyric Acid presents as a colorless to pale yellow liquid at room temperature, characterized by a sharp, pungent odor when concentrated but pleasant, fruity characteristics when diluted. The compound demonstrates good solubility in ethanol, propylene glycol, and most organic solvents, with limited solubility in water. It is manufactured under strict quality control standards to ensure consistent purity, typically exceeding 99%, with rigorous batch-to-batch uniformity maintained throughout production.

In flavor applications, 2-Ethylbutyric Acid is extensively utilized to create authentic fruit profiles, particularly tropical and stone fruit flavors such as pineapple, mango, apricot, peach, and passion fruit. Its sweet, slightly waxy character enhances the naturalness of fruit formulations, while its subtle dairy undertones contribute to cream, butter, and cheese profiles. The compound is also employed in beverage applications, where it adds depth and complexity to fruit juices, soft drinks, and alcoholic beverages, including wine and spirits. In confectionery and bakery products, it provides a rich, fruity character that complements sweet goods, fruit fillings, and dessert-type formulations.

Beyond the flavor industry, 2-Ethylbutyric Acid serves as a valuable intermediate in organic synthesis and pharmaceutical manufacturing. Its branched-chain structure makes it a useful building block for the preparation of various specialty chemicals, plasticizers, lubricants, and pharmaceutical compounds. In fragrance compositions, this versatile ingredient contributes sweet, fruity, and slightly animalic accords that enhance chypre, fruity-floral, and oriental-type perfumes, adding warmth and complexity to the overall composition.

Each batch undergoes comprehensive quality control, including gas chromatography analysis to verify purity, acid value determination to confirm concentration, organoleptic evaluation to assess the characteristic aroma profile, and physical property testing to ensure compliance with established specifications. The product is manufactured in accordance with applicable regulatory standards for flavor and fragrance ingredients.