Dodecyl benzenesulfonate

In the presence of an anionic surfactant such as sodium dodecyl-benzenesulfonate [25155-30-0] any protonated amine salt present forms an insoluble salt (4). Salt formation results in an increase in the pH of the solution. 

The lower limit of detection is 1 p.g/dm for sodium hexadecyl sulfonate, 2.5 p.g/dm for sodium dodecyl benzenesulfonate and 10 p.g/diW for sodium dodecyl sulfonate with sample volume of O.ldiW. The method proposed is highly sensitive, simple, rapid and guarantees environmental safety of analysis. 

A detergent, imparting better flexibility to cotton cloth is produced by adding 1% sodium a-sulfo hardened tallow fatty acid methyl ester and 9% disodium a-sulfo hardened palm oil fatty acid to a mixture of 5% sodium n-dodecyl-benzenesulfonate, 5% a-C16-olefmsulfonate, 3% dimethyldistearylammonium chloride, 15% zeolite, 10% sodium silicate, 10% sodium carbonate, 2% soap, 35% Na2S04-7H20, and 5% water [84],... 

Detergents and emulsifiers e.g. dodecyl benzenesulfonate, Triton X-100 [27] alcohol ethoxilates [27, 28], arlacel A [29]... 

SDBS = sodium dodecyl benzenesulfonate SDS = sodium dodecyl sulfate TEG =triethylene glycol TEOS = tetraethyl orthosilicate TOA = trioctylamine ... 

It is preferable to use either sodium dodecyl benzenesulfonate or sodium lauryl sulfate (the latter is preferred). 

Interactions of ofloxacin and levofloxacin with Al3+, Fe3+, and Mg2+ ions were investigated by capillary zone electrophoresis (07CHR489). A fluorescence enhancement phenomenon in the europium-ofloxacin-sodium dodecyl benzenesulfonate fluorescence system was observed when Gd3+ was added (07JFL105). A quantitative relation was found between the relative fluorescences of Zr, Mo, and V chelates of ofloxacin and the ionization of the carboxylic group and the calculated stability constants of the formed chelates (06MI34). Factors that significantly influence the stability of ofloxacin- and levofloxacin-metal (Al3+, Fe3+, Cu2+,... 

Membrane fouling due to adsorption of polyelectrolytes (such as humic acids, surfactants, and proteins) may severely reduce ion permeability, especially in the anion-exchange membranes. However, exhausted anion-exchange membranes used in the ED of molasses, whey, citric acid, or sodium dodecyl-benzenesulfonate can be reactivated by circulating simultaneously an acidic solution in one compartment and an alkaline solution in the other one, both solutions at titres greater than 0.1 kmol/m3 (Tokuyama Soda Co., 1983). 

In this context also, the electrochemical oxidation was proposed as effective process of wastewater treatment. Among surfactants, sodium dodecyl benzenesulfonate is generally assumed to represent anionic surfactants, whereas hexadecyltrimethy-lammonium chloride is assumed as representing the cationic class. 

Oxidation of sulphuric solutions of anionic surfactants was considered by Panizza and co-workers (Panizza et al. 2005) which compared the performance of ternary Ti-Ru-Sn oxide and BDD electrodes during oxidative treatment of synthetic and real wastewater containing sodium dodecyl benzenesulfonate. The authors demonstrated that the anionic surfactant was mineralised at active Ti-Ru-Sn electrodes only when a certain amount of chlorides were added to the solution. The process mainly occurred in homogeneous reaction by means of the oxidant species originated by chlorides, since it was not influenced by the stirring velocity of the solution. 

A = initial decrease of absorbance reduced to 1 min, c In the presence of a half-molar excess of />-dodecyl-benzenesulfonic acid, d 150W, >590nm, from 5cm for lh. 

The procedure is simple. The first addition of AN and fuel (urea or hexamine) and the "Tide" (sodium dodecyl benzenesulfonate) are powdered and mixed together. These are placed in a stainless steel pan. A candy thermometer is placed in the mixture so that it will go completely to the bottom of the mixture. The container is then place on a heat source that is easily and accurately controlled (e.g. electric hot plate). This is heated slowly until it begins to melt (100 degrees C. urea, 170 degrees C. Hexamine). This is where the danger lies. At this... 

Average value obtained using 2,6-diphenyl-4-(2,4,6-triphenyl-l-pyridinio)phenoxide, 1-hexadecyl-4-[(oxocyclohexadienylidene)ethylidene]-l,4-dihydropyridine, l-hexadecyl-5-hydroxyquinoline and l-hexadecyl-6-hydroxyquinoline, average deviation <9 % calculated from [47d]. Abbreviations SDS = sodium dodecyl sulfate DBS = dodecyl benzenesulfonate CTAC = hexadecyltri-methylammonium chloride CTAB = hexadecyltrimethylammonium bromide DTAC = dodecyl-trimethylammonium chloride DTAB = dodecyltrimethylammonium bromide DHP = dihexadecyl phosphate DDDAB = didodecyldimethylammonium bromide DMPC = dimyristoylphosphati-dylcholine DPPC = dipalmitoylphosphatidylcholine POPC = l-palmitoyl-2-oleoylphosphati-dylcholine PCA = phosphatidic acid. 

Dodecyl benzenesulfonates Polyoxyethylene fatty acid esters... 

The role of the surfactant was further studied in sonochemical reduction [20, 21] processes of Pt (IV) ions in water. It was investigated in the presence of various kinds of surfactants such as sodium dodecylsulfate (SDS) and sodium dodecyl-benzenesulfonate (DBS) as anionic surfactants, polyethylene glycol monostearate (PEG-MS) as non-ionic, and dodecyltrrmethylammonium chloride (DTAG) and bromide (DTAB) as cationic surfactants. An improved colorimetric determination reveals that Pt (IV) ion is reduced to zero-valent metal in two steps step (1) Pt (IV) ion to Pt (II) ion, and step (2) Pt (II) ion to Pt (0), and after the completion of step (1), step (2) sets in. 

Camphor sulfonic acid CV cyclic voltammogram CYP2D6 — cytochrome P450-2D6 DBSA dodecyl benzenesulfonic acid EAQ — Eastman AQ polymersTM FTIR — Fourier Transform infrared spectroscopy HRP — Horseradish peroxidase NMP N-methylpyrollidone PTM particle track-etched membrane PANIs... 

Interactions between oppositely charged micelles in aqueous solutions spontaneously form vesicles. The self-diffusion coefficient of water and 2H relaxation of 2H-labeled dodecyl trimethyl ammonium chloride of the dodecyl trimethyl ammonium chloride-sodium dodecyl benzenesulfonate systems show that in these mixtures there is limited growth of the micelles with changes in composition. The vesicles abruptly begin to form at a characteristic mixing ratio of the two surfactants. The transition is continuous.205 Transformation from micelle to vesicle in dodecyl trimethyl ammonium chloride-sodium perfluoro-nonanoate aqueous solution has been studied by self-diffusion coefficient measurements, and it was found that at a concentration of 35 wt% with a molar ratio of 1 1, the self-diffusion coefficient of the mixed micelles is far smaller than that of the two individual micelles.206 The characteristics of mixed surfactant... 

SDDBS and AOT denote the anionic surfactants sodium dodecyl-benzenesulfonate and sodium dioctyl-sulfosuccinate, respectively. Triton X-100 is the nonionic surfactant nonylphenol decafethylene-glycolether). Compound 1 is a mixture of sihcone oil and hydropho-bized silica Compound 2 is an emulsion of Compound 1, which contains also solid particles of Span 60. Data from References 684 and 687. 

Very recently, the self-assembly of poly(y-benzyl-i,-glulamalc)-fo-poly(i,-lysine) rod-coil copolypeptide via ionic complexation was reported by Ikkala, Hadjichristidis and coworkers [65]. Complexation between the anionic surfactants dodecyl benzenesulfonic acid and the cationic poly(L-lysine) chains occurs via proton transfer from the acid group to the base, resulting in electrostatically bonded comb-like structures, and fluid-like liquid crystalline structures at room temperature due to efficient plasticization of dodecyl benzenesulfonic acid. 

DODECYL BENZENESULFONATE or DODECYL BENZENESULFONIC ACID or DODECYLBENZENESULFONIC ACID, CALCIUM SALT (27176-87-0) C18H30O3S Combustible liquid. Forms explosive mixture with air (flash point 395°F/202°C). Strong oxidizers may cause fire and explosions. Contact with strong acids forms highly toxic sulfur oxide fumes. Reacts wilh alkalis. Corrosive to metals. When heated to decomposition releases highly toxic sulfur oxide fumes. On small fires, use dry chemical powder (such as Purple-K-Powder), alcohol-resistant foam, or COj extinguishers. 

NACCONATE 300 (101-68-8) see diphenylmethane-4,4 -diisocyanate. NACCONOL 988 A (27176-87-0) see dodecyl benzenesulfonate. 

DODECYL BENZENESULFONATE (27176-87-0) Forms explosive mixture with air (flash point 100°F/38°C). Strong oxidizers may cause fire and explosions. Reacts with alkalis. Corrosive to metals. 

Anionic Na stearate Na dodecyl sulfate Na dodecyl benzenesulfonate... 

Monaterge ALX-100S (Cocamide DEA (and) DEA Dodecyl-benzenesulfonate (and) Diethanolamine)... 

Amino Resins. Formaldehyde-modified amino resins (i.e., melamine, benzogua-namine, and urea resins) are the most important resins for the heat curing of hydroxyfunctional polyester resins. These resins are readily available with a low molecular mass (very good polyester compatibility, but less reactive) or in precondensed form (limited compatibility, but very reactive). In order to prevent premature reaction in the wet paint, the amino resins are blocked by etherification with, for example, methanol or butanol. Sulfonic acids (e.g., p-toluenesulfonic acid, dodecyl-benzenesulfonic acid) have proved suitable for accelerating the deblocking of amino resins during heat curing. These acids must also be used in blocked form (ammonium salts, thermolabile adducts). 

The catalysts which are predominately used are p-toluenesulfonic acid, dodecyl-benzenesulfonic acid, dinonylnaphthalenedisulfonic acid, and their amine salts [2.152]. Compared to partially alkylated amino resins, fully alkylated resins have a lower tendency to undergo self-condensation and produce films which are hard and still more flexible. 

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