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Quaternary Ammonium Salts

Quaternary ammonium is an organic compound in which the ammonia molecule is tetrasubstituted with carbon and has a cationic state. Salts of quaternary ammonium have been found in nature as biological compounds like acetylcholine chloride [A0084], trimethylglycine [B0455] and L-carnitine [C0049].
A lot of quaternary ammonium salts have been synthesized and the various applications have been reported so far. For example, in organic chemistry, tetramethylammonium hydroxide is used as an organic base. There are also various quaternary ammonium chlorides, bromides, iodides, intramolecular salts, etc. They are used as alkylating agents, phase transfer catalysts, deprotecting agents, ionic liquids, electrolytes, surfactants, and other materials.

TCI offers many quaternary ammonium salts listed in this page.

Tetramethylammonium Hydroxide

Tetramethylammonium Hydroxide

Tetramethylammonium hydroxide (TMAH) is used as a methyl esterification agent1) or a base catalyst.1,2) Its use as a surface cleaner1) or an etching agent1,3) has also been reported.

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Tetraethylammonium Hydroxide

Tetraethylammonium Hydroxide

Tetraethylammonium hydroxide (TEAH) has been reported to be used as a base catalyst,1,2) an ion-pair reagent,3) and a raw material for zeolite synthesis.3)

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Tetrapropylammonium Hydroxide

Tetrapropylammonium Hydroxide

Tetrapropropylammonium hydroxide (TPAOH) has been reported to be used as an ion-pair reagent1) and a raw material for zeolite synthesis.2)

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Tetrabutylammonium Hydroxide

Tetrabutylammonium Hydroxide

Tetrabutylammonium hydroxide (TBAOH) has been reported to be used as a strong base,1) a phase transfer catalyst,1,2) an ion-pair reagent,3) a polymerization catalyst,4) and a raw material for zeolite synthesis.5)

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Benzyltrimethylammonium Hydroxide

Benzyltrimethylammonium Hydroxide

Benzyltrimethylammonium hydroxide is used as a strong base and a phase transfer catalyst,1) and its use as an etching agent2) has also been reported.

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Tetrabutylammonium Chloride

Tetrabutylammonium Chloride

Tetrabutylammonium chloride (TBACl) has been used as a phase transfer catalyst1) and an ion-pair reagent2) for HPLC analysis.

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Tetrabutylammonium Bromide

Tetrabutylammonium Bromide

Tetrabutylammonium bromide (TBAB) has been reported to be used not only as a phase transfer catalyst1) but also as an ion-pairing reagent2) for HPLC analysis.

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Tetrabutylammonium Iodide

Tetrabutylammonium Iodide

Tetrabutylammonium iodide (TBAI) has been reported to be used not only as a phase transfer catalyst1) but also as an electrolyte.2)

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Benzyltriethylammonium Chloride

Benzyltriethylammonium Chloride

Benzyltriethylammonium chloride (BTEAC) has been reported to be used not only as a phase transfer catalyst 1,2) but also as a polymerization catalyst.3)

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Hexadecyltrimethylammonium Bromide

Hexadecyltrimethylammonium Bromide

Hexadecyltrimethylammonium bromide is a surfactant also called as cetyltrimethylammonium bromide (CTAB). CTAB has been reported to be used as an organic template for mesoporous silica synthesis,1) a capping agent for gold nanoparticles2), and a DNA extraction reagent.3)

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TCI also has a number of other quaternary ammonium salts available. Please see Ammonium Salts (Quaternary) [Chemical Structural Class].

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