Butyric acid , also known under the systematic name butanoic acid, abbreviated BTA,is a carboxylic acid. Salts and esters of butyric acid are known as butyrates or butanoates.
1. Butyric acid is used in the preparation of various butanoate esters. Low-molecular-weight esters of butyric acid, such as methyl butanoate, have mostly pleasant aromas or tastes. As a consequence, they find use as food and perfume additives
2. Due to its powerful odor, it has also been used as a fishing bait additive. Many of the commercially available flavours used in carp (Cyprinus carpio) baits use butyric acid as their ester base; however, it is not clear whether fish are attracted by the butyric acid itself or the additional substances added to it. Butyric acid was, however, one of the few organic acids shown to be palatable for both tench and bitterling
3. The hydrogenated naphthalenes tetrahydronaphthalene (tetralin) and decahydronaphthalene (decalin) are used as low-volatility solvents. Naphthalene is also used in the synthesis of 2- 2-naphthol, a precursor for various dyestuffs, pigments, rubber processing chemicals and other miscellaneous chemicals and pharmaceuticals
4. The substance has also been used as a noxious, nausea-inducing repellent by anti-whaling protesters, against Japanese whaling crews, as well as by anti-abortion protestors to disrupt and harass clinics