Alkyl trimethyl ammonium bromides

Acetoxy-2,4-dimethyl-m-dioxane Alkyl dimethyl ethylbenzyl ammonium chloride Alkyl trimethyl ammonium bromide Betaine hydrochloride Bishydroxyethyl dihydroxypropyl stearaminium chloride Calcium hypochlorite N-Chlorosuccinimide Cocamine acetate Cocoalkonium chloride Cocopropylenediamine Cocotrimonium chloride Copper acetoarsenite Copper gluconate (ic) Dehydroacetic acid Dialkyl dimethyl ammonium chloride... 

Eor univalent ionic surfactants, e.g., alkyl trimethyl-ammonium bromide and chloride, sodium alkyl sulfate, and sodium alkyl carboxylate. 

Dialkyl tellurides (general procedure) A mixture of TUDO (0.2 g, 2 mmol), NaOH (0.112 g, 2.6 mmol), Te powder (0.128 g, 1 mmol) in H2O (0.75 mL) and THF (0.75 ml) is refluxed for 1 h. The alkyl halide (2 mmol) and (cetyl trimethyl ammonium bromide) CTBA (0.004 g, 1.1 X 10 mmol) in THF (0.5 mL) are added to the pale pink solution. After 1 h of additional reflux the mixture is worked up in the usual manner and the residue purified by column chromatography on Si02 (elution with petroleum ether 40-60°C). 

M NaOH are plotted versus the concentration of various alkyl trimethyl ammonium bromides. Several things should be noted about these data ... 

FIG. 8.9 Experimental rate constants for Reaction (F) versus concentration for alkyl trimethyl ammonium bromides with the indicated chain length. (Redrawn, with permission, from J. Albriz-zio, J. Archila, T. Rodulfo, and E. H. Cordes, J. Org. Chem., 37, 871 (1972).)... 

Figure 11. Influence of cationic surfactants on the stability of polystyrene latices in comparison with potassium bromide (A)- Alkyl trimethyl ammonium bromides of various chain lengths (A) Ch (U) C8 O Ciol (+) Cn (O) C16.

For complete alkylation of half-cystine residues, after the DTT reduction procedure described in 3.8.2.1, (2-bromoethyl) trimethyl-ammonium bromide is added in a 3-fold molar excess over the DTT concentration. After reaction for 24 to 48 hr under nitrogen, at room temperature, the protein derivative is desalted either by gel filtration, or exhaustive dialysis, and lyophilized. 

As in the case of the concentration dependence of the chemical shift, the H and 13C band shapes of the surfactant resonance peaks are also concentration dependent. Analysis of H NMR band shapes for large aggregates of a cetyl trimethyl ammonium bromide-water system results in a CMC of 1.0 mM this is consistent with the value measured by other methods.57 The H NMR bands of alkyl trimethyl ammonium salicylate and hexadecyl pyridinium salicylate aqueous systems start to broaden at concentrations just above the CMC. The broadening continues up to a concentration above which the band shape is almost constant, as the concentration is further increased.-58 I3C NMR linewidth analysis of sodium octanoate in aqueous solution gives reasonable estimated CMC values.59... 

Quaternary ammonium alkyl salts sueh as hexadeeyl trimethyl ammonium bromide (CTAB), didodeeeylammonium bromide (DDAB)... 

The data obtained by various authors for the C12TAB solutions, both with and without the electrolyte, are quite consistent, however, the maximum experimental error in all experiments amounts to 3.0 mN/m, which is twice as large as that for Ci2S04Na (cf Fig. 3.45). The experimental and theoretical surface tension isotherms for various alkyl trimethyl ammonium bromides are summarised in Fig. 3.52 (data from [80-83]). 

See Alkyl trimethyl ammonium chloride Alkyl dimethyl benzalkonium saccharinate. See Benzalkonium saccharinate Alkyl dimethyl benzyl ammonium bromide. See Benzalkonium bromide... 

Cl4-18-alkyl trimethyl ammodium bromide. See Alkyl trimethyl ammonium bromide Caiiaway 1822. See Polyethylene Caiiaway 4000. See... 

Pentanium 2. See Lauralkonium chloride Pentanium 06Br40. See Cetrimonium bromide Pentanium 6CL30. See Cetrimonium chloride Pentanium 24-95USP, Pentanium 24 BP. See Benzalkonium chloride Pentanium 24CI35. See Alkyl trimethyl ammonium chloride Pentanium 26, Pentanium 26 80. See Benzalkonium chloride Pentanium D6-50. See Dicetyidimonium chloride... 

Quaternary ammonium compds., bis (hydrogenated tallow alkyl) dimethyl chlorides. See Quaternium-18 Quaternary ammonium compds., bis (hydrogenated tallow alkyl) dimethyl, chlorides, reaction prods, with bentonite. See Quaternium-18 bentonite Quaternary ammonium compds., bis (hydrogenated tallow alkyl) dimethyl, chlorides, reaction prods, with hectorite. See Quaternium-18 hectorite Quaternary ammonium compds., bis (hydrogenated tallow alkyl) dimethyl, compds. with bentonite and C8-C18-alkylbenzyldimethylammonium chloride. See Quaternium-18/benzalkonium bentonite Quaternary ammonium compds., bis (hydrogenated tallow alkyl) dimethyl, methyl sulfates. See Quaternium-18 methosulfate Quaternary ammonium compds., bis (hydroxyethyl) methyltallow alkyl, chlorides. See PEG-2 tallowmonium chloride Quaternary ammonium compds.. Cl 2-18-alkyl (hydroxyethyl) dimethyl, chlorides. See Alkyl dimethyl hydroxyethyl ammonium chloride Quaternary ammonium compds., C14-18 alkyl trimethyl, bromides. See Alkyl trimethyl ammonium bromide... 

Alkyl trimethyl ammonium chloride Ammonium nonoxynol-4 sulfate Butoxyethyl stearate Butyl acid phosphate t-Butylaminoethyl methacrylate Butyl phosphate Carbon black Ceteareth-16 Ceteareth-22 Ceteareth-29 Ceteth Cetrimonium bromide Cocotrimonium chloride C13-15 pareth-2 C13-15 pareth-3 C13-15 pareth-4 C13-15 pareth-7 C13-15 pareth-11 Deceth-4 phosphate Dibutyl butyl phosphonate... 

Dimethyl, methyl (polyethylene oxide acetate-capped) siloxane Disodium lauriminodipropionate Polysorbate 80 antistat, textile finishes Cetrimonium chloride Polyglyceryl-10 tetraoleate Stearyl hydroxyethyl imidazoline antistat, textile finishing Guanidine hydrochloride Quaternium-27 antistat, textile lubricants PEG-3 dioctoate PEG-2 oleate TEA-phosphate antistat, textile maintenance Quaternium-27 antistat, textile processing PEG castor oil antistat, textile scours Oleth-4 phosphate antistat, textile softeners Lauramine oxide antistat, textile spin finishes Alkyl trimethyl ammonium chloride Ceteareth Cetethyl morpholinium ethosulfate Cetoleth Cetrimonium bromide Lauramine oxide PEG cocamine PEG-2 oleamine PEG oleate PEG stearamine PEG stearate Polyethylene wax Polysorbate 60 Sodium cocoamphoacetate Trideceth phosphate... 

Alkyl trimethyl ammonium bromide Catinal HTB Empigen CHB40 68424-94-2 Accobetaine CL Amonyl 265 BA Ampho B11-34 Ampholan E210 Amphoram CB A30 Amphoteen BCM-30 Chem betaine BW Chem betaine C-42 Chem betaine CB Coco-betaine CTA/N... 

Cationic surfactants commonly comprise an alkyl hydrophobic tail and a methyl-ammonium ionic compound head, such as cetyl trimethyl ammonium bromide (CTAB), CjgH33N(CH3)jBr, and cetyl trimethyl ammonium chloride (CTAC), CjgH33N(CH3)3Cl. 

Alkyl trimethyl ammonium bromide (cetrlmide Sol.) Concentration % 40... 

Wu T-M, Wu C-Y (2006) Biodegradable poly(lactic acid)/chitosan-modified montmorillonite nanocomposites preparation and characterization. Polym Degrad Stab 91(9) 2198-2204 Xi Y, Ding Z, He H, Frost RL (2004) Stiucture of oiganoclays—an X-ray diffraction and thermogravimetric analysis study. J Colloid Inhxface Sci 277 116-120 Xi Y, Frost RL, He H (2007) Modification of the surfaces of Wyoming montmorillonite by the cationic surfactants alkyl trimethyl, dialkyl dimethyl, and trialkyl methyl ammonium bromides. J Colloid Interface Sci 305(1) 150-158... 

In their study of the emulsifier effect on the lipolytic activity, Mozaffar et al. [28] foxmd that the activity of the extracellular lipase of Pythium ultimum was more affected by the surfactant structure than by the surface area of the oil droplets. Replacing linear alkylbenzene sulfonate (LAS) by alpha olefin sulfonate or alkyl ether sulfate severely impairs the activity of Lipolase [16]. Other lipases are strongly inhibited by LAS, but not by sodium dodecyl sulfate (SDS) and sodium laurate, or by Aerosol OT and by cetyl trimethyl ammonium bromide (CTAB) but not by SDS. At low concentration, some nonionic surfactants favor and others impair the lipolytic activity [27]. Another lipase has been reported to be inhibited by anionic surfactants [29]. 

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