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C12-14 SEC-PARETH-9.

Valuable CAS 84133-50-6 / EMULSION STABILISING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A versatile non-ionic surfactant and emulsifier that creates stable oil-in-water formulations while helping to dissolve lipophilic ingredients like fragrances and silicones into water-based products. With its high HLB value of 13.5 and broad pH tolerance, it serves as a reliable workhorse ingredient in cleansers, conditioners, and leave-on treatments.

emulsion stabilising surfactant/cleansing surfactant/emulsifying solubilizer

Science

Functions by reducing interfacial tension between oil and water phases through its ethoxylated structure containing 9 moles of ethylene oxide. Its secondary alcohol base and high polarity enable effective emulsification and solubilization while remaining on the skin's surface due to its large molecular size.


Research

High confidence
Effective range 1.2–8%
Optimal

2%

Key findings

  1. 01 Non-irritating to rabbit skin in dermal irritation assessment
  2. 02 Mild skin irritant in human subjects when used in citrate buffer

Transparency

Not commonly dusted

Primarily a functional ingredient for emulsification and solubilization rather than active benefits, making dusting unlikely and unnecessary


The Formula

Solubility
Water
Optimal pH 3 – 12
0 7 14

Stability

Exceptionally stable across wide pH range with resistance to hard water, acids, and alkalis. Does not significantly affect viscosity or foam characteristics of final formulation.

Synergies

  • amodimethicone
  • fragrances
  • essential oils
  • silicones

Conflicts

  • strong oxidizing agents

Safety

CIR Status
Safe as used
Max tested
8%
Pregnancy
Safe
Sensitization risk Low

Safe when formulated to be non-irritating. Typical concentrations are up to 8% in rinse-off products and 1.8-2% in leave-on applications. Minimal dermal penetration expected due to high polarity and molecular weight.


Your Skin

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

Our Assessment

Valuable

A reliable and well-tolerated functional ingredient that enables stable formulations and ingredient solubilization across all skin types.


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