CH3CHCH3COOH

CH3CHCH3COOH is the condensed structural formula for isobutyric acid, also known as 2-methylpropanoic acid. It is a branched aliphatic carboxylic acid with four carbon atoms. The carboxyl group is attached to a tertiary carbon that bears two methyl substituents, giving it a distinctive branched structure.

Chemical and physical properties: Isobutyric acid has the molecular formula C4H8O2. It is typically described as a colorless liquid with a sharp, unpleasant odor. It is miscible with water to some extent and is soluble in many organic solvents. As a carboxylic acid, it participates in standard acid-base reactions, esterification with alcohols, and formation of salts with bases.

Production and occurrence: Isobutyric acid occurs in small amounts in some natural foods and fermentation products. Industrial production mainly involves oxidation of branched hydrocarbon precursors or oxidation of isobutanol derivatives, followed by purification. It is also accessible via various synthetic routes in organic synthesis.

Applications and uses: The compound is used as an intermediate in the synthesis of flavor and fragrance esters, including isobutyl esters, which contribute to fruity or nutty notes in products. It serves as a building block in organic synthesis and can be converted into derivatives for industrial applications.

Safety and handling: Isobutyric acid is a corrosive irritant. Exposure to its vapors or liquids can irritate the skin, eyes, and respiratory tract. It is flammable and should be stored away from heat sources in a well-ventilated area, using appropriate protective equipment when handling.