Isobutyric Acid is a clear, colorless liquid with an obnoxious, penetrating odor. Isobutyric acid, also known as 2-methylpropanoic acid, is a carboxylic acid with structural formula (CH3)2-CH-COOH. It is found in the free state in carobs (Ceratonia siliqua) and in the root of Arnica dulcis, and as an ethyl ester in croton oil.
The decreasing supply of world crude oil, the increasing amounts of food industry by-products, and
the increasing consumer demand for organic natural products in food additives, pharmaceutical products, and
preservatives, the production of butyric acid by microbial fermentation is becoming economically attractive