Sodium dodecylbenzene sulfonate

Catalog NumberHG25155300

CAS Number25155-30-0

CategoryAnionic Surfactants

Synonyms

Sodium lauryl benzene sulfonate

Molecular Weight

348.48

Molecular Formula

C18H29NaO3S

Application

Use as cleansing agent.; Use as emulsifying agent, dispersing agent.

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Case Study

Enhancing Aqueous Stability and Mobility of C60 Nanoparticles using Sodium Dodecylbenzene Sulfonate

Peng, Xianjia, et al. Journal of Environmental Sciences 42 (2016): 89-96.

Challenge: Colloidal stability and mobility behavior of nanoparticles like C60 fullerenes are critical factors that determine the environmental exposure. Unmodified C60 exhibits limited stability and mobility, hindering ecological exposure assessment.
Solution: Sodium dodecylbenzene sulfonate (SDBS), an anionic surfactant, was used to complex C60 nanoparticles. This created SDBS-C60 colloids with optimized surface properties for environmental studies.
Key Results:
· The SDBS-complexed C60 exhibited a ζ-potential of -49.5 mV at near-neutral pH and maintained stability over a 15-day aging period.
· Its critical coagulation concentration for NaCl was 550 mmol/L, surpassing that of common natural colloids and various raw nanomaterials, while being comparable to many surface-modified nanomaterials.
· Although SDBS improved the stability of the C60 colloid, it also increased the aggregation rate of the colloidal particles.
· Additionally, SDBS-complexed C60 displayed significantly higher mobility compared to unmodified C60. However, mobility decreased with increased ionic strength, as well as with higher concentrations of Ca2+ or Al3+.
· Overall, SDBS-complexed C60 demonstrated considerable stability and mobility.

Sodium Dodecylbenzene Sulfonate as Eco-Friendly Zinc Corrosion Inhibitor in Ammonium Chloride Solutions

Qiang, Yujie, et al. Journal of Cleaner Production 152 (2017): 17-25.

Challenge: In 26% NH4Cl (a common battery electrolyte) solutions, zinc corrosion requires effective inhibition. Traditional inhibitors are toxic and inefficient, demanding sustainable alternatives.
Solution: Sodium dodecylbenzene sulfonate (SDBS) was validated as a high-performance, eco-friendly anodic inhibitor for zinc protection. Its adsorption mechanism and temperature resilience were proven through electrochemical, microscopic, and computational methods.
Key Results:
· Superior Inhibition: Achieved 89.7% efficiency (0.8 mM, 298 K), outperforming HgCl2 (48.8%). Formed a protective film via mixed physisorption/chemisorption, obeying Langmuir model. FE-SEM/AFM showed dramatically reduced corrosion damage on SDBS-treated zinc.
· Battery-Compatible Behavior: Inhibition diminishes at positive potentials, preventing overprotection in battery systems.
· Temperature Resilience: Retained significant efficacy (298→328 K), enabling use in varied thermal conditions.
· Mechanistic Insights: Quantum calculations/MD simulations confirmed sulfonate groups adsorb vertically on zinc, enabling dense hydrophobic barrier formation. The dodecyl benzene moiety creates a water-repellent layer, blocking electrolyte access.
· Electrochemical validation: Based on potentiodynamic polarization and EIS results, the effective anodic inhibition and the film's stability are confirmed. The corrosion inhibition ability of SDBS is enhanced with the increase of SDBS concentration and decreased with the increase of temperature.

• Synonyms: Sodium lauryl benzene sulfonate
• Molecular Weight: 348.48
• Molecular Formula: C18H29NaO3S
• Application: Use as cleansing agent.; Use as emulsifying agent, dispersing agent.