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C12-13 PARETH-23.

Valuable CAS 66455-14-9 / CLEANSING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

C12-13 Pareth-23 is a highly ethoxylated non-ionic surfactant that serves dual functions as an emulsifier and moisture-enhancing agent in skincare formulations. This versatile ingredient creates stable oil-in-water emulsions while contributing to improved skin hydration through its protective barrier-forming properties. With 23 ethylene oxide units, it demonstrates excellent compatibility across all skin types with minimal irritation potential.

emulsifying surfactant thickening moisture retention

Science

Functions by dramatically reducing interfacial tension between oil and water phases, enabling the formation of stable emulsions that improve product spreadability and texture. On skin contact, it creates a thin protective film that helps retain moisture while enhancing the penetration of active ingredients through its surfactant properties.


Research

Medium confidence
Effective range 0.1–10%
Optimal

2%

Key findings

  1. 01 Demonstrated 48.6% increase in skin moisturization at 1 hour and sustained 34.2% improvement at 24 hours in controlled study of 20 participants

Transparency

Not commonly dusted

As a functional emulsifier and surfactant, this ingredient serves essential formulation purposes rather than marketing appeal, making dusting unlikely


The Formula

Solubility
Water
Optimal pH 2 – 10
0 7 14

Stability

Exhibits exceptional hydrolytic stability and pH resistance across wide range of formulation conditions

Synergies

  • Dimethicone Copolymer
  • silicone polymers

Safety

CIR Status
Safe as used
Max tested
10%
Sensitization risk Low

CIR Expert Panel confirms safety when formulated to be non-irritating. Related alkyl PEG ethers show minimal allergic reactions (0.25%-0.34%) in clinical patch testing


Your Skin

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

Our Assessment

Valuable

A reliable multifunctional ingredient that enhances both formulation stability and skin moisturization with excellent safety profile across all skin types.


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