Science
Mechanism of Action
This compound functions by significantly lowering the interfacial tension between oil and water phases, thereby enabling the formation and stabilization of emulsions. It acts as a solubilizer, a characteristic shared with related PEGylated castor oils, to incorporate water-insoluble ingredients into aqueous systems, which enhances product clarity and overall stability. As a cleansing agent, it helps to suspend and lift oils and greases, allowing them to be easily rinsed away. Derivatives of hydrogenated castor oil also exhibit emollient properties, contributing to skin hydration by forming a protective layer that can provide both occlusive and humectant benefits.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyethylene glycols are generally well-tolerated by the skin and resistant to microbial growth, potentially reducing the need for additional preservatives. For similar compounds like PEG 40 Hydrogenated Castor Oil, blending it cold into the oil phase at a 3:1 ratio (PEG to oil) before combining with the water phase is a suggested formulation technique, with flexibility to adjust ratios for optimal transparency. However, formulators should note potential aesthetic or stability challenges that might limit its overall utility.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that 130 PEGylated oil ingredients, including PEG-50 Hydrogenated Castor Oil (a closely related compound), are safe for use in cosmetics when formulated to be nonirritating. While specific maximum concentrations for SODIUM PEG-50 HYDROGENATED CASTOR OIL SUCCINATE are not provided, related PEG Castor Oil ingredients have been deemed safe up to 50%, and certain Hydrogenated Castor Oil derivatives up to 100%. The ingredient carries a higher EWG Skin Deep score for inhalable forms due to respiratory concerns but a lower score for solid or liquid applications. Trace amounts of 1,4-dioxane, a byproduct of ethoxylation, may be present but can be controlled through purification. Castor oil and its PEG derivatives are also permitted as indirect food additives by the FDA.
Your Skin
Skin Compatibility
Our Assessment
Verdict
SODIUM PEG-50 HYDROGENATED CASTOR OIL SUCCINATE is a valuable multi-functional ingredient, effectively aiding in emulsion stabilization, solubilization, and cleansing across a wide array of cosmetic formulations, with a favorable safety profile when properly implemented.
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