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CETEARETH-24.

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

A versatile non-ionic polyoxyethylene ether of cetearyl alcohol that serves as a cornerstone for stabilizing complex cosmetic architectures. It excels at bridging the gap between oil and water phases to create smooth, consistent textures in advanced skincare formulations.

Surfactant Emulsifying agent Cleansing agent Solubilizer

Science

Ceteareth-24 operates by lowering the interfacial tension between disparate phases, facilitating the creation of stable oil-in-water (O/W) emulsions. Its high Hydrophilic-Lipophilic Balance (HLB) allows it to function as a sophisticated solubilizer and cleansing agent, lifting lipid-based impurities from the skin surface so they can be effectively rinsed away without disrupting the skin barrier.


Research

High confidence
Effective range 1.5–10%
Optimal

5%

Key findings

  1. 01 Demonstrated negligible irritation during both short-term (4-day) and prolonged (21-day) patch testing, with zero evidence of sensitization.
  2. 02 A single dermal exposure resulted in only minimal irritation, confirming the high cutaneous tolerance of the Ceteareth family at high concentrations.

Transparency

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

As a functional emulsifier rather than an active ingredient, Ceteareth-24 is rarely 'dusted' for marketing purposes. It is typically included at the precise concentration required to maintain formula integrity.


The Formula

Solubility
Water
Optimal pH 3 – 12
0 7 14

Stability

Highly resilient due to its non-ionic nature; it remains stable across an expansive pH spectrum and shows excellent compatibility with diverse oils and botanical actives.

Synergies

  • Lipophilic emulsifiers
  • Mineral UV filters
  • Plant-derived lipids

Conflicts

  • Strong acids
  • Strong bases

Safety

CIR Status
Safe as used
Max tested
11%
Pregnancy
Safe
Sensitization risk Low

While safe for intact skin, the CIR recommends caution on damaged or severely burned skin to prevent potential systemic absorption of PEG-related components.


Your Skin

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

Our Assessment

Valuable

A reliable and high-tolerance emulsifier essential for achieving the sophisticated textures required in precision skincare.


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