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PEG-55 HYDROGENATED CASTOR OIL.

Valuable CAS 61788-85-0 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

PEG-55 Hydrogenated Castor Oil is a versatile, polyoxyethylenated derivative of hydrogenated castor oil that functions as a primary emulsifier and solubilizer. It ensures the stability of cosmetic formulations while also contributing skin-conditioning and hydrating properties.

Summary

emulsifying solubilizer surfactant cleansing emollient humectant occlusive consistency enhancer

Science

Mechanism of Action

This ingredient expertly reduces interfacial tension, facilitating the stable blending of oil and water phases within formulations. As a solubilizer, it effectively disperses hydrophobic components, such as oils and fragrances, into aqueous solutions. Its surfactant qualities contribute to cleansing by decreasing surface tension, aiding in the removal of impurities from the skin. On the skin, it acts as an emollient to promote smoothness and softness, forms a hydrating protective layer to minimize transepidermal water loss (occlusive effect), and functions as a humectant by attracting and retaining moisture. While direct studies on PEG-55 Hydrogenated Castor Oil's specific skin benefits are limited, related PEGylated castor oils like PEG-40 Hydrogenated Castor Oil have shown abilities to moisturize, improve dry skin, support stratum corneum repair, and exhibit anti-inflammatory effects.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

This ingredient is not typically associated with 'dusting' concerns, a term usually applied to active ingredients with specific efficacy thresholds or potential for misuse.

The Formula

Formulation

Solubility
Water
Optimal pH 5.5 – 7
0 7 14

Stability

PEG-55 Hydrogenated Castor Oil demonstrates excellent stability across a neutral to slightly acidic pH range, typically between 5.5 and 7.0 in aqueous solutions. Its inherent stability, shared with other PEGylated castor oils, generally provides good skin tolerance and does not typically necessitate extensive microbiological preservation.

Safety

Safety Profile

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

The Cosmetic Ingredient Review (CIR) Expert Panel has determined that PEG Castor Oils, including PEG-55 Hydrogenated Castor Oil, are safe for cosmetic application, extrapolating from comprehensive assessments of similar derivatives like PEG-30 and PEG-40 Hydrogenated Castor Oil. It is generally considered non-irritating and suitable for sensitive skin, provided the final product formulation is non-irritating; however, individual sensitivities can vary, and patch testing is recommended. Trace amounts of 1,4-dioxane, a by-product of the ethoxylation process, are controlled through stringent purification methods. This ingredient is permitted under the general provisions of the Cosmetics Regulation of the European Union.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-55 Hydrogenated Castor Oil is a valuable multi-functional ingredient, crucial for stabilizing formulations and enhancing texture, while delivering recognized skin conditioning and hydrating benefits suitable for all skin types.

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