Get a Free 5ml Mini Now Free 5ml Mini With Every Order of The Mantle

CETEARETH-18.

Valuable CAS 68439-49-6 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A high-performance non-ionic emulsifier and surfactant used to stabilize complex oil-in-water formulations. Its waxy consistency helps build luxurious textures while ensuring that active ingredients are evenly distributed and effectively delivered to the skin.

Surfactant Emulsifier Cleansing Agent Penetration Enhancer

Science

Functions as a powerful emulsifying agent with a high HLB value of 16.3, reducing interfacial tension to create stable microscopic droplets. It forms a protective film around oil phases to prevent separation and acts as a penetration enhancer by temporarily modifying the skin's lipid structure to increase the bioavailability of co-formulated actives.


Research

High confidence
Effective range 1–5%
Optimal

1.5%

Key findings

  1. 01 Demonstrated to be a non-sensitizer in repeat-insult patch testing, indicating high skin compatibility at standard usage levels.
  2. 02 Observed to produce only minimal irritation after single dermal exposure, confirming a wide margin of safety.

Transparency

Not commonly dusted
Min. effective
0.5%
Red flag below
0.1%

As a functional texturizer and stabilizer rather than a bio-active, 'dusting' is less relevant; however, concentrations below 0.5% may indicate it is being used merely for label claims or as a secondary solubilizer rather than a primary emulsifier.


The Formula

Solubility
Both
Optimal pH 3 – 12
0 7 14

Stability

Extremely resilient across a wide thermal and pH spectrum. Requires heating to approximately 80°C for proper integration into the aqueous phase.

Synergies

  • Low HLB emulsifiers
  • Lipophilic active ingredients
  • Humectants

Conflicts

  • Strong oxidizing agents
  • Highly concentrated mineral acids
  • Strong alkaline bases

Safety

CIR Status
Safe as used
Max tested
50%
Pregnancy
Safe
Sensitization risk Low

While generally safe, it should not be applied to severely damaged or broken skin to prevent any potential systemic absorption of PEG-based components.


Your Skin

Yes Normal
Yes Dry
Yes Oily
No Sensitive
Irritancy Low
Comedogenicity Moderate

Our Assessment

Valuable

An essential structural component for creating stable, high-performance emulsions with enhanced delivery capabilities for active ingredients.


Related

Finding similar ingredients…