Tetra-n-butylammonium bromide, also known as tetrabutylammonium bromide, is a white crystalline solid with deliquescence. Its melting point is 118 ℃. It is readily soluble in water, ethanol, ether and acetone, and slightly soluble in benzene.Tetrabutylammonium bromide cas:1643-19-2 has the following synonyms:TBAB; TBABr; Bu4NBr; TABA; Tetra-n-butylammonium bromide; Tetrabutylazanium bromide; ALIQUAT(R) 100; Tetrabutylammoniumbromid; IPC-TBA-BR; It can be used in the synthesis of pharmaceutical intermediates such as benzyltriethylammonium chloride, ethyl cinnamate and pseudoionone, etc., as well as in the production of organic drugs including anti- infective agents like bamacillin and sultamicillin. In addition, tetrabutylammonium bromide acts as a catalyst in the synthesis of listed drugs such as the anti diabetes drug dagelin with a new mechanism of action. In addition, it can not only be used as a phase transfer agent to synthesize tiopronin, a liver function improvement and metabolic antidote, but also can be used as a bromine agent to participate in the synthesis of muscle relaxant reversal agent Sugenglucuronium.