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PEG-50 HYDROGENATED CASTOR OIL SUCCINATE.

Valuable / SURFACTANT - EMULSIFYING, VISCOSITY CONTROLLING

PEG-50 Hydrogenated Castor Oil Succinate is a versatile PEGylated oil derivative that primarily functions as a surfactant, emulsifier, and solubilizer in skincare formulations. It aids in blending oil and water phases, distributing products evenly, and can also help control viscosity. Its safety profile is well-established by CIR, noting it is safe when formulated to be non-irritating.

Summary

Emulsifying Surfactant Solubilizer Viscosity Controlling

Science

Mechanism of Action

This ingredient functions as a primary surfactant, actively lowering the surface tension of cosmetic formulations to ensure uniform product distribution upon application. It effectively acts as an emulsifier, promoting the stable formation of finely dispersed mixtures of oil and water, and serves as a solubilizer for components that might otherwise be insoluble. Additionally, it contributes to formulation aesthetics as a viscosity controlling agent. Related PEGylated castor oil derivatives have demonstrated benefits such as enhancing skin hydration by drawing and locking moisture from the environment, supporting the repair and function of the skin barrier, and exhibiting anti-inflammatory effects by inhibiting the release of inflammatory mediators and reducing tissue edema.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 A microemulsion gel system containing PEG-40 Hydrogenated Castor Oil was determined not to be a skin irritant in rats.
  2. 02 A formulation with PEG-40 Hydrogenated Castor Oil was concluded not to irritate human skin in a dermal irritation test in mice.
  3. 03 Nanoemulsions containing PEG-35 Castor Oil demonstrated non-irritating effects in rabbit eyes.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

This ingredient improves the clear solubility of products in water-based systems and enhances the long-term stability of solubilized formulations. As a PEG derivative, it is generally well-tolerated by the skin and exhibits low microbiological sensitivity, which may contribute to a reduced need for additional preservatives within the ingredient itself.

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
100%
Sensitization risk Low

The CIR Expert Panel concluded that PEG-50 Hydrogenated Castor Oil, along with 129 other PEGylated oil ingredients, is safe for use in cosmetics under current practices and concentrations, provided the final formulation is non-irritating. This decision updates an earlier assessment from 1997. The base ingredient, castor oil, is FDA-approved as a flavoring agent for direct food addition, and PEG Castor Oil ingredients can serve as indirect food additives. Trace amounts of 1,4-dioxane, a potential by-product of its manufacturing process, can be effectively managed through purification methods.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-50 Hydrogenated Castor Oil Succinate is a valuable multi-functional ingredient, primarily acting as an emulsifier, surfactant, and solubilizer, with a robust safety profile from CIR when used in non-irritating formulations.

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