Sodium 4-dodecylbenzenesulfonate

Sodium dodecylbenzenesulfonate is a straight-chain benzene sulfonate, a type of detergent. 

Straight-chain benzene sulfonates were invented as replacements for branched-chain benzene sulfonates, which were the first detergents but which could not be easily broken down by microbes in streams, rivers, or sewage treatment plants. 

These detergents are in use in many products, from laundry detergents to detergent soap bars. They are the most common type of detergent in use. 

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Fig. XIII-15. Adsorption isotherm for sodium dodecylbenzenesulfonate on cotton. Curve I, 30°C curve II, 0°C. (From Ref. 64.)...

The CMC for sodium dodecylbenzenesulfonate is about lO Af at 25°C. Calculate K for the preceding reaction, assuming that it is the only process that occurs in micelle formation. Calculate enough points to make your own quantitative plot corresponding to Fig. Xni-13. Include in your graph a plot of (Na )(R ). Note It is worthwhile to invest the time for a little reflection on how to proceed before launching into your calculation ... 

Sodium dodecylbenzenesulfonate is undoubtedly the anionic surfactant used in the greatest amount because it is the basic component in almost all laundry and dishwashing detergents in powder and liquid forms. However, alcohol and alcohol ether sulfates are the more versatile anionic surfactants because their properties vary, with the alkyl chain, with the number of moles of ethylene oxide added to the base alcohol and with the cation. Consequently, alcohol and alcohol ether sulfates are used in almost all scientific, consumer, and industrial applications. 

Sodium dodecyl sulfate was separated from sodium dodecylbenzenesulfonate and sodium dodecanesulfonate by TLC on activated silica gel G. The spots were located by charring at 250°C for 15 min [281,282]. 

Anionic surfactants are present in surface water, resulting in serious environmental pollution. Therefore, adsorption of surfactants, such as sodium dodecylsulfate [155,156], on Mg/Al LDHs has received considerable attention. Ulibarri et al. also published the results of sorption of an anionic surfactant (sodium dodecylbenzenesulfonate) from water by LDHs and calcined samples (773 K), focusing both on their potential application as a sorbent and on the possibility of their recycling [154,157]. They found that anionic exchange was complete when the interlayer anion in the LDH precursor was Cl", reaching 100 % of AEG, and calcined LDH-carbonates were better adsorbents than those derived from LDH-chloride samples, however. It was also claimed that an increase in the crystallinity of the LDH samples probably leads to better ordered calcined mixed oxides, facilitating reconstruction of the layers and enlarging the absorption capacity. 

Formulated metal polishes consist of fine abrasives similar to those involved in industrial buffing operations, ie, pumice, tripoli, kaolin, rouge and crocus iron oxides, and lime. Other ingredients include surfactants (qv), eg, sodium oleate [143-19-1] or sodium dodecylbenzenesulfonate [25155-30-0]-, chelating agents (qv), eg, citric acid [77-92-9] and solvents, eg, alcohols or aliphatic hydrocarbons. 

Molecular Weight b Critical Micelle Concentration sodium dodecylsulfate d sodium dodecylbenzenesulfonate... 

Fig. 8.7 ICE values during the electrolysis at a BDD electrode of anionic and cationic surfactant solution. Electrolyte 0.0615 mM sodium dodecylbenzenesulfonate solution 0.07 mM hexade-cyltrimethyl ammonium chloride solution, i = 4mAcm 2 (Lissens et al. 2003)...

Hidaka, H., J. Zhao, E. Pelizzetti and N. Serpone (1992). Photodegradation of surfactants. 8. Comparison of photocatalytic processes between anionic sodium dodecylbenzenesulfonate and cationic benzyldodecyldimethylammonium chloride on the Ti02 surface. Journal of Physical Chemistry, 96(5), 2226-2230. 

SODIUM DISULFITE see SIIOOO SODIUM DITHIONITE (DOT) see SHR500 SODIUM DITOLYLDIAZOBIS-8-AMINO-1-NAPHTHOL-3,6-DISULFONATE see CMO250 SODIUM DITOLYLDIAZOBIS-8-AMINO-1-NAPHTHOL-3,6-DISULPHONATE see CMO250 SODIUM DODECYLBENZENESULFONATE (DOT) see DXW200... 

Sodium dodecylbenzenesulfonate, 1-tetradecanoic acid, and tetradecane did not enhance the de-crosslinking (Table I entries 15-17). These results indicate that the long alkyl chain was not effective to enhance the degradation, and functional groups that can react to ester groups would be crucial to promote the degradation. 

The electrochemical behavior of ascorbic acid (1) and uric acid (3) in the presence of micelles and their selective determination were investigated. Aqueous cetylpyridinium bromide (cpb) and sodium dodecylbenzenesulfonate (sdbs) miceUar solutions have been used. The oxidation peak potentials for 1 and 3 are separated by 270 mV in the presence of cpb in aqueous phosphate buffer solution (pH 6.8), thus allowing their selective determination, as well as the selective determination of 3 in the presence of excess of 1. The method is simple, inexpensive and rapid with no need to modify the electrode surface by tedious procedures, and it was applied to 3 determination in samples of human urine and serum. Abnormal levels of uric acid in urine and serum are symptomatic of several diseases (gout, hyperuricaemia and Lesch-Nyhan syndrome) . 

Kamegawa and Yoshida (612] studied the pH dependence of the adsorption of several surface-active agents by chemically modified carbons. The uptake of nonionic polyoxyethylene nonylphenyl ether (PO) was not affected by pH, but it deereased with increasing outgassing temperature of the carbon. The uptakes of both the cationic octadecyltrimethylammonium chloride (OT) and the anionic sodium dodecylbenzenesulfonate (DB) exhibited a shallow minimum at intermediate pHs. The authors concluded that the van der Waals force was dominant in the adsorption of PO, while electrostatic attraction and repulsion, respectively, contributed to the behavior of OT and DB. 

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