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Moumoujus

PEG-8 LAURATE.

Questionable CAS 9004-81-3 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

PEG-8 Laurate is a versatile ethoxylated fatty acid ester functioning primarily as an emulsifier and surfactant, crucial for blending immiscible phases in formulations. It additionally offers potential benefits as a penetration enhancer and provides mild moisturizing properties to the skin.

Summary

Emulsifying Surfactant/Cleansing Thickener Stabilizer Penetration Enhancer Moisturizing Emollient Lubricant Opacifier Pigment Dispersant Spreading Aid Viscosity-Modifying Agent

Science

Mechanism of Action

As a single-chain surfactant, PEG-8 Laurate effectively combines oil and water-based ingredients, enhancing product stability, texture, and viscosity. It can transiently reduce the skin barrier function, thereby facilitating the diffusion and absorption of other active ingredients. Furthermore, it aids in skin cleansing by enabling the emulsification of oils and dirt for easy rinsing, and contributes to skin hydration and softening.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 Pretreatment of hairless mouse skin with elastic vesicles containing PEG-8 Laurate significantly increased the diffusion of 3H2O, suggesting its potential as a penetration enhancer.
  2. 02 A related compound, PEG-8 dilaurate, at 5% concentration, did not demonstrate enhanced dermal penetration of ketoprofen through mouse skin when incorporated into a drug delivery plaster.

Transparency

Dusting Analysis

Not commonly dusted

PEG-8 Laurate is a functionally effective ingredient in cosmetic formulations; however, its use necessitates rigorous quality control and careful consideration of application, particularly due to potential manufacturing impurities and risks on compromised skin, rather than a general lack of efficacy.

The Formula

Formulation

Solubility
Both
Optimal pH 4.5 – 7
0 7 14

Stability

A 3% aqueous solution of PEG-8 Laurate typically exhibits a stable pH within the 4.5 to 7.0 range.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
25%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel deemed PEG-8 Laurate safe for use in cosmetics at concentrations up to 25% on intact skin. Crucially, this safety assessment is qualified: formulations containing PEG-8 Laurate should not be applied to damaged or broken skin due to observed kidney effects and systemic toxicity in burn patients treated with PEG-based creams. Furthermore, the ethoxylation process used in its production can result in impurities such as 1,4-dioxane (a known carcinogen) and unreacted ethylene oxide (known to increase cancer incidences), requiring stringent purification. While its PEG-8 component was noted as a mild sensitizer and irritant in studies, no evidence of systemic toxicity or sensitization was found with intact skin when referring to PEG-based creams. The Environmental Working Group (EWG) rates PEG-8 Laurate as a moderate to high hazard, citing concerns regarding organ toxicity and contamination.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Questionable

While PEG-8 Laurate is effective as an emulsifier and can aid ingredient penetration, its overall suitability for precision skincare is questionable due to significant safety concerns regarding manufacturing impurities and specific risks when applied to compromised skin.

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