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Here's a concise summary of Sodium Laurylsulfonate:
Chemical Identity:
Common Name: Sodium dodecylbenzenesulfonate (SDBS or LAS)
Formula: C₁₈H₂₉NaO₃S
Structure: Linear dodecyl chain (C₁₂) attached to a benzene ring with a sulfonate group (-SO₃⁻Na⁺).
Key Properties:
White/yellow powder or liquid.
Highly soluble in water; forms micelles.
Strong anionic surfactant (lowers surface tension, emulsifies oils).
Hard-water resistant and stable in acids/bases.
Primary Uses:
Main surfactant in laundry/dish detergents.
Emulsifier in agrochemicals, textiles, paints.
Industrial wetting agent.
Safety/Environment:
Biodegradable (linear alkyl chain preferred).
Mild skin/eye irritant; handle with care.
Note: Not Sodium Lauryl Sulfate (SLS) — "sulfonate" (C-SO₃) vs. "sulfate" (C-OSO₃) chemistry differs!
Sodium Laurylsulfonate (also called Sodium Dodecylbenzenesulfonate or SDBS, though note naming nuances) is an anionic surfactant with the following chemical characteristics:
Chemical Formula:
C₁₂H₂₅C₆H₄SO₃Na (for linear alkylbenzene sulfonate, common form)
Simplified: C₁₈H₂₉NaO₃S
Structure:
A hydrophobic tail: Linear dodecyl chain (C₁₂H₂₅⁻) attached to a benzene ring.
A hydrophilic head: Sulfonate group (-SO₃⁻Na⁺).
Not to be confused with Sodium Lauryl Sulfate (SLS), which has a sulfate head (-OSO₃⁻).
Key Properties:
Appearance: White/light yellow powder or viscous liquid.
Solubility: Highly soluble in water, forms micelles.
Surface Activity: Lowers surface tension, emulsifies oils.
Stability: Resists hard water (unlike soaps), stable in acids/bases.
Synthesis:
Made by sulfonation of linear alkylbenzene (LAB) with SO₃, followed by neutralization with NaOH.
Applications:
Detergents/Cleaners: Main surfactant in laundry detergents, dish liquids.
Emulsifier: In pesticides, textiles, paints.
Wetting Agent: For industrial processes.
Safety & Environment:
Biodegradable (linear chain preferred over branched).
Mild skin irritant (less than SLS); avoid eye contact.
In short: Sodium laurylsulfonate (often called LAS or SDBS) is a cost-effective, water-resistant anionic surfactant (C₁₈H₂₉NaO₃S) widely used in detergents and industrial applications.
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