Laureth-4 Carboxylic Acid
What is Laureth-4 Carboxylic Acid?
Laureth-4 Carboxylic Acid is a synthetic anionic surfactant produced by ethoxylating lauryl alcohol with four ethylene oxide units and then adding a carboxylic acid group. This ether carboxylate structure gives it excellent water solubility and mild cleansing power. Primarily used in rinse-off products like facial cleansers, shampoos, body washes, and bath foams, it works by lowering surface tension between water, oils, and skin. This action creates micelles—tiny spheres that trap dirt, sebum, and residues—for effortless rinsing. Its mild nature preserves the skin's natural moisture barrier better than traditional sulfates, while providing stable foam and compatibility with other cosmetic ingredients in emulsions.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Delivers gentle cleansing without overly stripping skin lipids.
Offers reliable foaming for satisfying lather in wash products.
Non-comedogenic, minimizing pore clogging risks.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| People seeking sulfate-free cleansing options. | Those allergic to ethoxylated compounds. |
| Individuals with normal or oily skin types. | People sensitive to coconut-derived ingredients. |
| Users preferring mild surfactants in daily routines. | Individuals with rare contact reactions to carboxylates. |
Safety Notes
- Low skin and eye irritation potential in typical use.
- Rated low overall hazard by established databases.
Frequently Asked Questions about Laureth-4 Carboxylic Acid
Is Laureth-4 Carboxylic Acid mild on skin?
Yes, it shows low irritation potential compared to harsher cleansers.
What products contain it?
Common in shampoos, body washes, and facial cleansers for foaming.
Does it clog pores?
No, it has a zero comedogenic rating.