TEA Dodecylbenzenesulfonate is a powerful anionic surfactant primarily utilized for its high-foaming and degreasing capabilities in rinse-off formulations. It functions as a robust cleansing agent that efficiently removes sebum and environmental pollutants from the skin and hair. In cosmetic chemistry, it is valued for maintaining stability across a wide range of pH levels and water hardness.
- INCI Name:
- TEA-Dodecylbenzenesulfonate
- Chemical/Scientific Name:
- Triethanolamine dodecylbenzene sulfonate
- Common Aliases:
- TEA-LAS, Linear Alkylbenzene Sulfonate Triethanolamine Salt
| Category: | Surface-Active Substances |
| Source Origin: | Synthetic |
| Comedogenic Rating: | N/A (Primarily rinse-off) |
| Primary Industries: | Hair Care, Body Cleansing, Industrial Cleaning |
| Solubility: | Water |
At a Glance: Properties & Effects
| Sebum Control: | |
| Formula Stability: | |
| Irritation Risk: | |
| Texture Enhancement: |
- Primary Benefits:
- Provides excellent flash foam and bubble stability in shampoos.
- Effectively emulsifies oils, allowing them to be rinsed away with Aqua.
- Maintains performance in hard water conditions where other soaps might fail.
- Potential Risks:
- High degreasing potential may lead to temporary dryness or barrier disruption.
- Possesses a higher potential for skin irritation compared to non-ionic surfactants.
Biological Action & Cosmetic Profile
Acting as an anionic surfactant, this molecule features a hydrophobic “tail” and a hydrophilic “head.” The dodecylbenzene portion of the molecule attaches to lipophilic substances like excess skin oils and styling product residue. Simultaneously, the triethanolamine sulfonate head binds to water, allowing the oil-surfactant complex to be washed away. This dual-natured mechanism is the fundamental principle behind its efficacy in clarifying shampoos and deep-cleansing body washes.The inclusion of the Triethanolamine (TEA) salt rather than a sodium salt often results in a more soluble and slightly milder profile than traditional alkylbenzene sulfonates. However, it remains a potent cleanser. In the context of formulation, it assists in lowering the surface tension of a liquid, facilitating easier spreading of the product across the skin or scalp.
Broader Applications & Origins
Synthesis of this compound typically involves the sulfonation of linear alkylbenzenes followed by neutralization with Triethanolamine. Beyond the personal care sector, this ingredient is a staple in the textile industry for its wetting properties and in household detergents. Its industrial prevalence is due to its cost-effectiveness and chemical resilience. In cosmetics, it is rarely the sole surfactant and is usually blended to balance its aggressive cleansing action.
Routine Integration
- Synergies:
- Secondary Surfactants: Pairing with Coco Betaine or Decyl Glucoside reduces the overall irritation potential while maintaining foam volume.
- Humectants: Formulations containing Glycerin or Panthenol help mitigate the drying effects on the skin barrier.
- Conflicts:
- Compromised Barriers: Avoid using high concentrations on skin suffering from eczema or acute dermatitis due to its potential to strip essential lipids.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel has evaluated TEA-Dodecylbenzenesulfonate and concluded it is safe for use in cosmetic products when formulated to be non-irritating. Research indicates that while the pure substance is a significant skin and eye irritant, these effects are concentration-dependent. In rinse-off applications, exposure time is minimal, which significantly reduces the risk of adverse reactions. SCCS and CIR guidelines suggest that leave-on products should use much lower concentrations, though this ingredient is seldom found in such formulations.
Is TEA Dodecylbenzenesulfonate safe for sensitive skin?
Products containing this ingredient may be too harsh for those with very sensitive or dry skin. It is a high-performance cleanser that can strip natural oils, so individuals with a compromised barrier should look for formulas where it is balanced by soothing agents like Allantoin.
Why is this ingredient used in shampoos?
It is used because it creates a rich, dense lather and effectively removes heavy silicone buildup or sebum from the hair shaft. Its stability ensures the shampoo remains effective regardless of the mineral content in the tap water.
Does it contain sulfates?
Technically, it is a sulfonate rather than a sulfate. While chemically distinct, they share similar cleansing properties. If you are specifically avoiding “sulfates” due to scalp sensitivity, you may find sulfonates similarly drying.