Dodecyl benzenesulfonic acid

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. 

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... 

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. 

DODECYL BENZENESULFONIC ACID (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. 

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. 

Synonyms Benzenesulfonic acid, dodecyl-, sodium salt Dodecylbenzene sodium sulfonate Dodecylbenzenesulfonate, sodium salt Dodecyl-benzenesulfonic acid sodium salt NaDBS SDBS Sodium alkylben-zene sulfonate, branched Sodium lauryl benzene sulfonate ClassiTication Substituted aromatic compd. 

Ammonium dodecylbenzene sulfonate CAS 1331-61-9 EINECS/ELINCS 215-559-8 Synonyms Ammonium lauryl benzene sulfonate Benzenesulfonic acid, dodecyl-, ammonium salt Dodecyl benzenesulfonic acid, ammonium salt... 

Kuban et al. carried out the extraction of Methylene Blue (M B) in an aqueous phase into butanol using ion pairs in a microchannel [2]. The extraction efficiency of MB into hexanol is poor, but in the presence of an anionic surfactant such as dodecyl-benzenesulfonic acid (DBSA), an ion pair MB" -DBSA is formed that is easily extracted. Figure 12.3 shows the device constructed from two glass slides (GSl and GS2). The channel length for extraction is 45 mm. The flow channel between the two glass slides was formed by a three-layer spacer and its depth can be changed from 150... 

Finally comments are necessary on a general feature of the polyelectrolyte catalysis. As stated in the introductory part, high molecular weight compounds are more efficient in accelerating chemical reactions under appropriate conditions. It should be noted that this statement is not always justified. For example, polyvinylpyridine is less efficient than 4-picoline in enhancing the solvolysis of dinitrophenyl acetate [62], whereas this polymer is extremely efficient compared to 4-picoline for the solvolysis of 5-nitro-4-acetoxysalicylic acid. Imidazole was 50 times more efficient than polyvinylimidazole in the formation of N-acyl compounds of p-nitrophenyl acetate in dimethylformamide [63]. In the hydrolyses of butylacetate and propyl-acetate, dodecyl benzenesulfonic acid was 6 and 3 times more eflScient than polystyrene sulfonate, respectively [64]. 

Figure 5.23 shows the effect of amphiphilep-(n-dodecyl)benzenesulfonic acid (DBSA) when mixed with the Weyburn crude oil/C02 system. Note that the amphiphile has a strong effect on asphaltene-precipitation inhibition. The reason for the strong effect of DBSA is a large negative forms of... 

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