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C12-15 PARETH-4.

Valuable CAS 68131-39-5 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A versatile nonionic surfactant and emulsifier derived from polyethylene glycol and C12-15 fatty alcohols. It is primarily utilized to bridge the gap between oil and water phases, ensuring skincare formulations remain stable and uniform while facilitating the effective solubilization of fragrances and botanical oils.

emulsifying surfactant cleansing solubilizing

Science

By lowering the interfacial tension between traditionally incompatible oil and water molecules, it enables the creation of smooth, homogenous emulsions. Due to its lipophilic nature and low Hydrophilic-Lipophilic Balance (HLB), it is exceptionally efficient at dispersing oils within aqueous systems, improving the spreadability and texture of the final product.


Research

Medium confidence
Effective range 2–8%
Optimal

3%

Key findings

  1. 01 Clinical evaluations of specialized blends containing this ingredient have demonstrated potential for improving skin elasticity and supporting scalp health, specifically regarding hair follicle revitalization.

Transparency

Not commonly dusted
Min. effective
1%
Red flag below
0.5%

While primarily a functional emulsifier, its inclusion at very low percentages is standard for formulation stability; however, claims regarding skin elasticity should only be made when used at concentrations verified by clinical data (typically 2% or higher).


The Formula

Solubility
Oil
Optimal pH 2.5 – 13.5
0 7 14

Stability

Possesses remarkable stability across a vast pH spectrum, making it compatible with both highly acidic treatments and alkaline hair care products. It supports cold-processing, which preserves the integrity of heat-sensitive actives.

Synergies

  • Lipophilic sunscreens
  • Essential oils
  • Fragrance compounds

Conflicts

  • Strong oxidizing agents
  • Extreme temperatures combined with strong acids or bases

Safety

CIR Status
Safe as used
Max tested
3%
Pregnancy
Safe
Sensitization risk Low

The CIR Expert Panel considers it safe for cosmetic use provided the formulation is engineered to be non-irritating and manufacturing processes strictly limit impurities like 1,4-dioxane.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Valuable

A highly stable and reliable structural component that ensures the integrity and tactile elegance of complex oil-in-water emulsions.


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