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Moumoujus

OLETH-40.

Valuable CAS 9004-98-2 / CLEANSING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

Oleth-40 is a polyethylene glycol ether of oleyl alcohol, primarily serving as a versatile surfactant and emulsifying agent. It facilitates cleansing by enabling water to mix with oils and dirt, while also stabilizing complex formulations and aiding in ingredient solubilization.

Summary

Emulsifying Surfactant Cleansing

Science

Mechanism of Action

On the skin, Oleth-40 functions by reducing surface tension, which allows water to effectively interact with and lift away oils and dirt, promoting a thorough cleansing action. As an emulsifier, it plays a critical role in stabilizing formulations, preventing the separation of immiscible components and ensuring a homogenous product consistency.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Oleth-40, an effective emulsifier, exhibits solubility in both oil and water, with its water solubility increasing proportionally to its ethylene oxide content. While specific optimal pH ranges for Oleth-40 are not detailed, a related compound, Oleth-5, demonstrates sensitivity to high pH, suggesting potential hydrolysis for Oleth-40 above pH 7.0. It maintains stability across oxidizing, reducing, and hard water conditions.

Conflicts

  • Not recommended for use on compromised or damaged skin due to potential enhanced penetration of other ingredients and mild to moderate irritation risk.
  • Exhibits sensitivity to high pH environments, which can lead to hydrolysis.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Oleth-40 is safe for use under current cosmetic practices. However, it carries a mild to moderate risk of eye and skin irritation. Based on studies related to polyethylene glycol (PEG), it is advised against use on damaged skin due to its potential to enhance the penetration of other ingredients. Trace amounts of 1,4-dioxane, a potential byproduct of ethoxylation, may be present but can be controlled through purification processes. The SCCS has not issued a specific opinion on Oleth-40 but has addressed similar ethoxylated compounds and 1,4-dioxane in other contexts; the FDA participates in the CIR review process.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Moderate
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Oleth-40 is a valuable functional ingredient, essential for its emulsifying and cleansing properties in formulations, though its use necessitates careful consideration of potential mild to moderate irritation, enhanced ingredient penetration, and an advisory against application on damaged skin.

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