Science
Mechanism of Action
This ingredient operates as a three-dimensional crosslinked silicone elastomer. Its primary mechanism involves significantly increasing the structural viscosity of the oil phase, thereby acting as an effective thickening agent and stabilizing water-in-oil emulsions. It imparts a soft, silky skin feel, offers a mattifying effect, and improves overall product stability. Furthermore, it functions as a light stabilizer, contributing to the integrity of formulations.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 A study utilizing 100% concentration administered under occlusion to intact and abraded skin of New Zealand White rabbits demonstrated a Primary Irritation Index of 0.10. This low index indicates the ingredient is not a primary irritant, establishing a high safety margin regarding skin irritation.
Transparency
Dusting Analysis
As a silicone elastomer commonly supplied as a swollen gel in various oils, this ingredient is not typically associated with dusting in cosmetic formulations.
The Formula
Formulation
Stability
Optimal stability is observed within a functional pH range of 5.5 to 8.5. Investigations on related PEG/PPG dimethicone polymers (e.g., PEG-8 dimethicone) indicate that at a pH of 5 and 1% active, approximately 20% hydrolysis occurs over 45 days, while at pH 8 and 1% active, 20% hydrolysis takes 86 days. This ingredient is typically supplied as pre-swollen gels within various silicone oils.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that dimethicone crosspolymer ingredients, including PEG-15/Lauryl Dimethicone Crosspolymer, are safe in cosmetic products at current use practices and concentrations, up to 3%. The substance also holds approval from the SCCS, subject to specific conditions outlined in Annex III of the EC Cosmetics Regulation. While generally considered safe and exhibiting low irritancy, individuals with highly sensitive skin might potentially experience mild irritation. As a PEG derivative, theoretical concerns regarding trace residues of ethylene oxide and 1,4-dioxane exist, with overall safety dependent on ingredient purity.
Your Skin
Skin Compatibility
Our Assessment
Verdict
LAURYL DIMETHICONE PEG-15 CROSSPOLYMER is a valuable formulation enhancer, imparting desirable sensory qualities and stability to a wide range of cosmetic products with a low risk of irritation or comedogenicity.
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