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C12-16 PARETH-5.

Valuable CAS 68551-12-2 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A versatile nonionic surfactant and emulsifying agent derived from a blend of C12-16 synthetic fatty alcohols. It functions as a precision bridge between oil and water phases, ensuring formula homogeneity and gentle cleansing action.

emulsifying surfactant cleansing solubilizing

Science

By utilizing a dual-affinity structure—a hydrophobic C12-16 alkyl chain and a hydrophilic polyoxyethylene chain (5 moles)—it lowers interfacial tension to create stable oil-in-water emulsions. It organizes into micelles that encapsulate sebum and environmental debris, allowing them to be rinsed away without disrupting the skin's lipid barrier.


Research

High confidence
Effective range 1–25%
Optimal

5%

Key findings

  1. 01 Clinical dermal testing confirmed that while undiluted forms may be reactive, aqueous solutions at 25% exhibit significantly lower irritation potential, supporting its safety in finished formulations.
  2. 02 Technical evaluations demonstrate that concentrations between 1-5% effectively stabilize emulsions and improve the solubility of hydrophobic actives without the irritation typical of anionic surfactants.

Transparency

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

This is a functional excipient rather than a marketing active; its presence at low concentrations is typically for emulsion stabilization rather than consumer-facing claims.


The Formula

Solubility
Water
Optimal pH 3 – 11.5
0 7 14

Stability

Highly stable across a broad pH spectrum and resistant to hard water. With an HLB value of approximately 10.5, it is optimized for oil-in-water (O/W) systems.

Synergies

  • Anionic surfactants
  • Cationic surfactants
  • Amphoteric surfactants
  • Hydrophobic active ingredients

Conflicts

  • Strong oxidizers
  • Strong mineral acids

Safety

CIR Status
Safe as used
Max tested
25%
Sensitization risk Low

Modern manufacturing employs vacuum stripping to ensure 1,4-dioxane byproducts remain below 10 ppm, meeting stringent safety standards.


Your Skin

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

Our Assessment

Valuable

An efficient and stable nonionic emulsifier that provides necessary formula structure and gentle cleansing without the high irritation risk of traditional surfactants.


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