Science
Mechanism of Action
This ingredient operates by significantly reducing the surface tension between different phases, allowing immiscible substances like oils and water to combine and form stable, homogeneous product textures. As a solubilizer, it is adept at dispersing and incorporating lipid-soluble components, such as fragrances and essential oils, into water-based matrices. Its surfactant capabilities facilitate effective cleansing by enabling dirt, excess oil, and makeup to be suspended and easily rinsed from the skin. Furthermore, PEG-29 Castor Oil may contribute emollient properties, helping to soften and lubricate the skin surface and potentially forming a protective film that minimizes transepidermal water loss, thereby enhancing hydration.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 The CIR Expert Panel concluded that PEG-29 Castor Oil, within the family of PEGylated oils, is safe for cosmetic application at concentrations up to 50%. This determination is supported by scientific data demonstrating minimal to no dermal or ocular irritation when formulated appropriately.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
PEG-29 Castor Oil exhibits good solubility in both water and alcohol. To ensure product purity, it requires specific purification steps to control and remove trace amounts of 1,4-dioxane. Optimal stability is maintained by storing the ingredient in a tightly closed, dry container at temperatures not exceeding 30°C, protected from moisture. It is generally compatible with a wide range of non-ionic, anionic, and cationic cosmetic ingredients.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed PEG-29 Castor Oil safe for use in cosmetics at concentrations up to 50%, contingent on the final product being formulated to be non-irritating. A recognized concern with PEGs is the potential presence of 1,4-dioxane, a by-product of the ethoxylation process; however, this can be effectively controlled through stringent purification methods. While typically well-tolerated on healthy skin, studies involving similar PEGs (e.g., 50% PEG-35 Castor Oil) have indicated a potential to increase the sensitization of other ingredients. Therefore, its use should be avoided on compromised or broken skin. Regulatory bodies such as the FDA and the European Union's Cosmetics Regulation permit its use, with the FDA listing castor oil components for various applications including indirect food additives.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-29 Castor Oil is a valuable multi-functional ingredient, instrumental in stabilizing diverse formulations and solubilizing oil-soluble actives, with a well-established safety profile when utilized within recommended concentrations and avoided on compromised skin.
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