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Ceteareth-50.

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

Ceteareth-50 is a high-performance polyethylene glycol ether of cetearyl alcohol that functions as a robust non-ionic emulsifier and solubilizer. In precision skincare, it is utilized to ensure the uniform distribution of oil-based ingredients within water-rich formulas, resulting in stable and aesthetically pleasing textures.

Surfactant Cleansing agent Emulsifying agent Solubilizer

Science

It functions by decreasing the interfacial tension between disparate oil and water phases, allowing them to form a cohesive emulsion. Its high HLB (Hydrophilic-Lipophilic Balance) value of approximately 17.8 makes it exceptionally water-soluble, acting as a protective colloid that stabilizes complex dispersed systems and aids in the gentle removal of debris during cleansing.


Research

High confidence
Effective range 0.5–10%
Optimal

5%

Key findings

  1. 01 Clinical patch testing at 1.5% and 10% concentrations demonstrated minimal irritation potential and no evidence of sensitization across 4-day and 21-day trials.
  2. 02 Safety assessments indicate the ingredient is non-mutagenic and non-toxic within the standard effective range of 0.5% to 10% for solubilization.

Transparency

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

As a functional emulsifier rather than an active treatment, 'dusting' is less applicable; however, concentrations below 0.5% may indicate it is being used merely as a secondary stabilizer rather than a primary solubilizing agent.


The Formula

Solubility
Water
Optimal pH 5 – 7
0 7 14

Stability

Exhibits excellent stability across acidic and alkaline environments and maintains integrity in hard water conditions.

Synergies

  • Lipophilic surfactants
  • Organic sunscreens
  • Essential oils

Conflicts

  • Nitrosating agents
  • Damaged or compromised skin barriers

Safety

CIR Status
Safe as used
Max tested
5%
Pregnancy
Safe
Sensitization risk Low

While safe for intact skin, the CIR Expert Panel advises against use on damaged or burnt skin due to the potential for systemic absorption of PEG components which may impact kidney function.


Your Skin

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

Our Assessment

Valuable

A highly reliable and stable emulsifier that ensures formula integrity and effective cleansing for all skin types when applied to healthy skin.


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