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PEG-40 RICINOLEAMIDE.

Valuable CAS - / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

PEG-40 Ricinoleamide is a versatile ingredient, primarily functioning as an emulsifier and surfactant to facilitate the blending of immiscible liquids in formulations. It also acts as a cleansing agent and offers emollient benefits, contributing to skin hydration and barrier support.

Summary

Emulsifying Surfactant Cleansing Agent Emollient Anti-inflammatory Skin Barrier Improvement

Science

Mechanism of Action

This ingredient effectively lowers surface tension, enabling the stable incorporation of oil- and water-based components in cosmetic formulations. As a surfactant, it assists in solubilizing and removing dirt and oils from the skin, ensuring thorough cleansing. Its emollient action establishes a protective layer on the skin's surface, minimizing moisture loss and supporting the skin's natural barrier function. Furthermore, research indicates it possesses anti-inflammatory effects.

Research

Clinical Evidence

Medium confidence
Effective range 0.05–20.66%
Optimal

N/A

Key findings

  1. 01 Dermal irritation tests in mice with formulations containing 20% PEG-40 hydrogenated castor oil indicated a probable non-irritating effect on human skin.
  2. 02 A microemulsion gel system with 20.66% PEG-40 hydrogenated castor oil was determined to be non-irritating to the skin in studies conducted on male albino rats.
  3. 03 A repeated insult patch test in 120 human volunteers, utilizing a formulation with 0.05% PEG-40 hydrogenated castor oil, recorded only one instance of almost imperceptible erythema among five subjects during the induction phase.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH 5.5 – 7
0 7 14

Stability

PEG-40 Ricinoleamide, similar to related PEGylated oils, is stable in aqueous systems within an optimal pH range of 5.5 to 7.0, acting as a hydrophilic non-ionic solubilizer.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
100%
Sensitization risk Low

The CIR Expert Panel has concluded that PEG-30 and PEG-40 hydrogenated castor oil are safe for use in cosmetics at concentrations up to 100%, a finding reaffirmed in 2012 for 130 related PEGylated oils when formulated to be non-irritating. The previous cautionary note regarding use on damaged skin has been removed. The FDA approves PEG-40 hydrogenated castor oil for both external application and as a direct and indirect food additive. The SCCS has not specifically evaluated PEG-40 Ricinoleamide.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-40 Ricinoleamide is a valuable multi-functional ingredient, providing essential emulsifying and cleansing properties, coupled with emollient benefits and a strong safety profile for all skin types.

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References

Sources