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PEG-36 OLEATE.

Valuable CAS 9004-96-0 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

PEG-36 Oleate is a versatile non-ionic surfactant, acting primarily as an emulsifier and solubilizer to stabilize cosmetic formulations. It also functions as a cleansing agent, viscosity modifier, and provides emollient and potential hydrating benefits to the skin.

Summary

emulsifying solubilizing stabilizing surfactant/cleansing viscosity control thickening emollient hydrating

Science

Mechanism of Action

As a non-ionic surfactant, PEG-36 Oleate effectively reduces surface tension between oil and water phases, facilitating the formation and stabilization of emulsions. It enhances the solubility of sparingly soluble or water-insoluble compounds, such as fragrances, botanical extracts, fatty acids, and fat-soluble vitamins (A, D, E, K). In cleansing applications, it lowers the surface tension of the skin's stratum corneum, aiding in the gentle removal of impurities. Furthermore, this polyethylene glycol derivative can contribute to skin hydration by attracting and binding water molecules through hydrogen bonding, thereby supporting moisture retention and reducing transepidermal water loss. It also impacts product texture as a viscosity regulator and thickening agent, while imparting emollient properties.

Research

Clinical Evidence

Insufficient-data confidence
Effective range 0.1–10%
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 8
0 7 14

Stability

PEG-36 Oleate demonstrates good stability across a range of temperatures and pH conditions (acidic to alkaline). For optimal cosmetic formulation, particularly in cleansing products, a pH between 5.0 and 8.0 is recommended. While stable under normal conditions, polyethylene glycols may interact with oxygen at elevated temperatures (above 120°C), where the inclusion of antioxidants can enhance chemical stability.

Safety

Safety Profile

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

The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed the safety of PEG-36 Oleate, along with other PEG fatty acid esters, for cosmetic use within concentrations typically ranging from 0.1% to 10%. Previous concerns regarding PEG use on compromised skin were addressed and removed in 2010, indicating no safety issues even on damaged skin. This ingredient is characterized by low toxicity and is generally considered non-irritating. Notably, PEG 300 oleate, which shares the same CAS number, has FDA approval as a secondary direct food additive.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-36 Oleate is a valuable ingredient for its multifunctional properties in stabilizing formulations, improving ingredient solubility, cleansing, and offering mild emollience and hydration across all skin types with a low risk of irritation or comedogenicity.

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