Ammonium dodecyl sulfate

Among the ionic tensides investigated were sodium alkyl sulfates with hydro-phobic chains with different lengths (C8, CIO, C12), C12-PEG-ether sulfates with 8-50 EO groups and sodium, lithium and ammonium dodecyl sulfate. For all the ionic tensides investigated, lengthening the hydrophobic chain led to a similar increase in the w-value as with non-ionic tensides. The kifl values increased both as a function of the hydrophobic chain and also with that of the hydrophilic EO-part, the nature of the counter-ion having no effect. 

Ammonium dodecyl sulfate Ammonium-N-dodecyl sulfate. See Ammonium lauryl sulfate... 

CAS 2235-54-3 68081-96-9 90583-12-3 EINECS/ELINCS 218-793-9 Synonyms Ammonium dodecyl sulfate Ammonium-N-dodecyl sulfate Dodecyl ammonium sulfate Lauryl ammonium sulfate Lauryl sulfate ammonium salt Sulfuric acid, lauryl ester, ammonium salt Sulfuric acid, monododecyl ester, ammonium salt Definition Ammonium salt of lauryl sulfate Empiricai C12H26O4S HsN Properties M.w. 283.48 HLB 31.0 anionic... 

Synonyms Ammonium dodecyl sulfate Ammonium-N-dodecyl sulfate Dodecyl ammonium sulfate Lauryl ammonium sulfate Lauryl sulfate ammonium salt Sulfuric acid, lauryl ester, ammonium salt Sulfuric acid, monododecyl ester, ammonium salt... 

Hong, Y., Roy, D., Babu, S.V., 2005b. Ammonium dodecyl sulfate as a potential corrosion inhibitor surfactant for electrochemical mechanical planarization of copper. Electrochem. Solid State Lett. 8, G297—G300. 

Surfactants such as CTAB, ammonium dodecyl sulfate, and SDS were also investigated as corrosion inhibitors for Cu film. However, these surfactants may cause poor slurry stability and insufficient corrosion inhibition. Among various corrosion inhibitors reported in the literature, BTA is still the most efficient corrosion inhibitor. Although an addition of a corrosion inhibitor causes a decrease in MRR by preventing the dissolution of Cu film, it is one of essential components of high planarization and improved surface quality. 

Kim, H.-U., Lim, K.-H. Sizes and structures of micelles of cationic octadecyl-trimethylammonium chloride and anionic ammonium dodecyl sulfate surfactants in aqueous solutions. Bull. Korean Ghem. Soc. 2004, 25(3), 382-388. 

For the investigation of molecular recognition in micelles, adenine derivatives and positively charged (thyminylalkyl)ammonium salts such as shown in Figure 30 were prepared, which were solubilized in sodium dodecyl sulfate (SDS) solutions. Nmr studies have shown that binding occurs in a 1 1 molar ratio in the interior of the micelles as illustrated in Figure 30 (192). 

Sulfation by sulfamic acid has been used ia the preparation of detergents from dodecyl, oleyl, and other higher alcohols. It is also used ia sulfating phenols and phenol—ethylene oxide condensation products. Secondary alcohols react ia the presence of an amide catalyst, eg, acetamide or urea (24). Pyridine has also been used. Tertiary alcohols do not react. Reactions with phenols yield phenyl ammonium sulfates. These reactions iaclude those of naphthols, cresol, anisole, anethole, pyrocatechol, and hydroquinone. Ammonium aryl sulfates are formed as iatermediates and sulfonates are formed by subsequent rearrangement (25,26). 

Salts of monovalent metals of alcohol and alcohol ether sulfates are soluble in water, with the solubility dependend on the cation and the chain length. Ammonium salts are more soluble than sodium salts and these are more soluble than potassium salts. On the other hand, sulfates with short hydrophobic chains are more soluble than those with longer chains but the short-chain molecules have a solubilizing effect on the more insoluble longer chain molecules [68], The solubility of sodium salts of different alcohol sulfates is shown in Fig. 2 and the solubility of sodium and potassium salts of dodecyl sulfate is compared. 

Sodium alcohol sulfates are also used in the formulation of synthetic soaps and paste hand cleaners, commonly together with other surfactants and as tablet disintegrators in the case of sodium dodecyl sulfate. Sodium, but preferably ammonium and alkanolamine salts, is also used in liquid soaps. 

The luminescence of macrocrystalline cadmium and zinc sulfides has been studied very thoroughly The colloidal solutions of these compounds also fluoresce, the intensity and wavelengths of emission depending on how the colloids were prepared. We will divide the description of the fluorescence phenomena into two parts. In this section we will discuss the fluorescence of larger colloidal particles, i.e. of CdS particles which are yellow as the macrocrystalline material, and of ZnS particles whose absorption spectrum also resembles that of the macrocrystals. These colloids are obtained by precipitating CdS or ZnS in the presence of the silicon dioxide stabilizer mentioned in Sect. 3.2, or in the presence of 10 M sodium polyphosphate , or surfactants such as sodium dodecyl sulfate and cetyldimethylbenzyl-ammonium... 

Ethoxylated methylcarboxylates Propoxyethoxy glyceryl sulfonate Alkylpropoxyethoxy sulfate as surfactant, xanthan, and a copolymer of acrylamide and sodium 2-acrylamido-2-methylpropane sulfonate Carboxymethylated ethoxylated surfactants (CME) Polyethylene oxide (PEG) as a sacrificial adsorbate Polyethylene glycols, propoxylated/ethoxylated alkyl sulfates Mixtures of sulfonates and nonionic alcohols Combination of lignosulfonates and fatty amines Alkyl xylene sulfonates, polyethoxylated alkyl phenols, octaethylene glycol mono n-decyl ether, and tetradecyl trimethyl ammonium chloride Anionic sodium dodecyl sulfate (SDS), cationic tetradecyl trimethyl ammonium chloride (TTAC), nonionic pentadecylethoxylated nonylphenol (NP-15), and nonionic octaethylene glycol N-dodecyl ether Dimethylalkylamine oxides as cosurfactants and viscosifiers (N-Dodecyl)trimethylammonium bromide Petrochemical sulfonate and propane sulfonate of an ethoxylated alcohol or phenol Petrochemical sulfonate and a-olefin sulfonate... 

Note PEO = polyethylene oxide PVA = polyvinyl alcohol SDS = sodium dodecyl sulfate CTAB = cetyl trimethyl ammonium bromide. 

Figure 13.7 Electropherograms showing the simultaneous measurement of low- and high-energy explosives as recorded with the (a) conductivity and (b) amperometric detectors. Analytes, ammonium (1), methylammonium (2), sodium (3), TNB (4), TNT (5), 2,4-DNB (6), and 2-Am-4,6-DNB (7), system peak (SP). Explosive concentration, 2 mM (1,2,3) and 15 ppm (4,5,6,7). Conditions MES/His buffer (20 mM, pH 6.1) containing 15 mM lithium dodecyl sulfate as the run buffer separation field strength, +250 V/cm injection field strength, +250 V/cm for 2 s detection at 200 kHz, (a) 5 Vp p and at (b) —0.5 V. (Reprinted in part with permission from [34]. Copyright 2002 American Chemical Society.)...

Chemicals Company Ltd., Tokyo. 6ED was highly pure as confirmed by gas-liquid chromatography(GLC), thin layer chromatography(TLC) and surface tension measurements. Sodium dodecyl sulfate, C 2H25S02Na (SDS) was purified by recrystallization from ethanol twice. p-[(CF3)2CF]2C=C(CF )0(CH2CH20)2CH3(NF) was donated by Neos Co. 8-Anilino-l-naphthaiene sulfonic acid ammonium salt(ANS) was obtained from Wako Pure Chemical Industries, Ltd. Perfluorocarbon oil(pp-l,... 

Duynstee and Grunwald present some experimental data for Reaction (F) in the presence of hexadecyl trimethyl ammonium bromide (CTABr, C = cetyl) and sodium dodecyl sulfate (NaLS, L = lauryl). Sodium hydroxide was the source of OH" in all cases. A pseudo-first-order rate constant of 2.40 x 10-2 s-1 is observed for A CTABr. Use the following absorbance data to evaluate NaLS for this reaction ... 

The reaction of Problem 10 was studied at two different temperatures, and, from the temperature dependence of the rate constants, the authors determined AH% and ASJ, the enthalpy and entropy of activation, respectively. The following values of these parameters were obtained in pure water and in 0.01 M sodium dodecyl sulfate (NaLS) and 0.01 M hexadecyl trimethyl ammonium bromide (CTABr) ... 

TLC separation of DNP-amino acids may be carried out on cellulose [14] or on polyamide layers [15,16] with several types of solvent systems. A two-dimensional separation of DNP-amino acids on cellulose with toluene—2-chloroethanol—pyridine—5 N ammonia (5 3 1.5 6.5) and saturated ammonium sulfate-water-sodium dodecyl sulfate (25 ml 175 ml 0.144 g) is shown in Fig.4.8. A similar separation on polyamide layers is... 

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