Butyric acid
Butyric acid, also known as fatty acid, is a carboxylic acid of CH3CH2CH2-COOH and a short chain saturated fatty acid present in rancid butter, pamasan cheese, vomit and underarm odor. Butyric acid with an unpleasant odor, taste first spicy sweet, similar to ether. 10ppb concentration of butyric acid can be dog sniff, people are greater than 10ppm. Butyric acid is a fatty acid that exists in the form of butyrate in animal fats and vegetable oils. Its glycerol ester accounted for 3 to 4% of butter, when the butter rot, with bad smell of butyric acid that is released through the hydrolysis. It is a major member of short chain fatty acids. Butyric acid is weak acid, acidity is similar to acetic acid (pKa = 4.76), pKa is 4.82. This similarity is related to their shared -CH2COOH terminal structure. Butyric acid density 0.96 g / cm3, molar mass 88.1051. Industrial use of sucrose or starch fermentation made of butyric acid, butyric acid was used to produce a variety of butyrate. A relatively small molecular weight esters, such as methyl butyrate, have a pleasant scent and taste, and are therefore used as food and perfume additives. Also used to demonstrate the esterification reaction. ...