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PEG-9 RICINOLEATE.

Valuable CAS 9004-97-1 / SURFACTANT - CLEANSING

PEG-9 Ricinoleate is a PEGylated derivative of castor oil, primarily functioning as an emulsifier and surfactant in skincare formulations. It helps to stabilize oil-in-water mixtures and facilitates effective cleansing. Additionally, it contributes to skin hydration by attracting and retaining moisture.

Summary

Emulsifying Agent Cleansing Agent Humectant Solubilizer

Science

Mechanism of Action

This ingredient operates as a surfactant by lowering the surface tension of liquids, which aids in the efficient cleansing of skin and hair. As an emulsifier, it enables the stable blending of immiscible liquids, such as oils and water, creating uniform product textures. Furthermore, its polyethylene glycol component is known to form hydrogen bonds with water, enhancing skin hydration and supporting the reduction of transepidermal water loss, thereby assisting in barrier function restoration.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

No specific data suggests that PEG-9 Ricinoleate is commonly 'dusted' or associated with undesirable product residue.

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Polyethylene glycols and their derivatives, including PEG-9 Ricinoleate, exhibit general stability and are well-tolerated by the skin, making them versatile for cosmetic use. While no precise optimal pH range is specified, general PEG emulsifiers are functional across neutral, mildly alkaline, and acidic systems.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that 130 related PEGylated oils, including castor oil derivatives, are safe in current cosmetic use and concentrations, provided they are formulated to be non-irritating. The CIR reaffirmed in 2024 the safety of Ricinus Communis (Castor) Seed Oil and various Ricinoleates. Manufacturers employ purification processes to mitigate trace amounts of 1,4-dioxane, a potential ethoxylation byproduct.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-9 Ricinoleate is a valuable multi-functional ingredient, serving as a safe and stable emulsifier, surfactant, and humectant across a broad range of cosmetic formulations.

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