Dialkyldimethylammonium salts

Dialkyldimethylammonium salts of the type R2N+(CH3)2C1 and imidazolinium salts of structure... 

Monoalkyltrimethylammonium salts, e.g. cetyltrimethylammonium bromide. Monoalkyldimethylbenzylammonium chloride, e.g. benzalkonium chloride. Dialkyldimethylammonium salts, e.g. didecyldimethylammonium halides. 

Monoalkyltrimethylammonium salts Dialkyldimethylammonium salts Benzalkonium salts Alkylpyridinium salts... 

Monoalkyldimethylbenzylammonium chloride, e.g. Benzalkonium chloride (18.1.2.). Dialkyldimethylammonium salts, e.g. didecyldimethylammonium halides (18.1.3.). Heteroaromatic ammonium salts (one R stands for a long-chain alkyl group, and the remaining three R are components of an aromatic system such as p5Tidine, quinoline or isoquinoline) e.g. cetylpyridinium halide and alkylisoquinolinium bromide (18.1.8.). 

The Ci4-Ciii dialkyldimethylammonium salts used in fabric softeners for home laundry have poor water solubility. Normal phase chromatography is most conveniently used for the separation of these compounds, especially in environmental matrices. Most often, detection is by conductivity and the cations are isolated and injected as ion pairs. 

Tallow dialkyldimethylammonium salt single peak for all homologs environmental analysis... 

Tallow dialkyldimethylammonium salt mono- and trialkyl impurities measured separated from an imi-dazolininium compound and from Ci6 alkylbenzyldimethylammo-nium chloride monoalkyl compounds resolved by chain length... 

The compound class of quaternary alkylammonium salts includes alkyltrimethyl-ammonium and dialkyldimethylammonium compounds,... 

The most recent advances in MS, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) were applied in positive ion mode to the analysis of three oral rinse and one commercial disinfectant formulation. In the latter, a complex mixture containing three dialkyldimethylammonium and alkylbenzyl-dimethylammonium (Ciq, C14, Cjs) salts was detected and in three oral rinse, cetylpyri-dinium chloride was the cationic surfactant present. Besides, the dissociation was verified as the mode of ionization of quaternary ammonium under MALDI conditions (Morrow et al, 2001). 

C o dialkyldimethylammonium and Ci2 alkyltrimethylammonium salts from beer and water... 

Didecyldimethylammonium chloride and dodecyltrimethylammonium bromide determination in beer C15-C18 dialkyldimethylammonium, dialkylmethyl-2-hydroxyethylam-monium, and dialkylmethylpoly (oxyethylene)-ammonium salts determination in laundry detergent C14-C20 dialkylimidazolium quats separation by total alkyl chain length... 

The ISO method for determination of cationics gives separate procedures for determination of high and low molecular weight compounds (94,95). Low MW compounds (MW less than about 500) such as alkyltrimethylammonium salts are simply dissolved and titrated as described above. Higher MW compounds, such as dialkyldimethylammonium fabric softeners have poor water solubility and are therefore taken up in isopropanol, diluted with water, and used to titrate a known quantity of anionic surfactant,... 

Nakashima, T. and Kimizuka, N. (2002). Vesicles in salt Formation of bilayer membranes from dialkyldimethylammonium bromides in ether-containing ionic liquids. Chemistry Letters, 10,1018-1019. 

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