Science
Mechanism of Action
As a polyoxypropylene, polyoxyethylene ether of Lauryl Alcohol, PPG-3-LAURETH-9 works by reducing interfacial tension, thereby enabling the formation and stabilization of oil-in-water emulsions. Beyond its emulsifying capabilities, it provides topical anesthetic and anti-itch effects to relieve discomfort, while also acting as an emollient to soften and smooth the skin.
Research
Clinical Evidence
High confidence3%
Transparency
Dusting Analysis
Insufficient data available to determine common 'dusting' practices or thresholds for this specific ingredient.
The Formula
Formulation
Stability
PPG-3-LAURETH-9 is highly soluble in water and low aliphatic alcohols, demonstrating hydrophilicity and miscibility in water at 20°C. It maintains stability in acidic pH environments and resists decomposition under high temperatures, in hard water, and in both oxidizing and reducing conditions. However, it is susceptible to hydrolysis and breakdown at elevated alkaline pH levels.
Conflicts
- High alkaline pH (leads to hydrolysis and decomposition)
- Unpurified formulations (potential for 1,4-dioxane impurities)
- Fragrance applications (not recommended)
- Flavor applications (not recommended)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) expert panel and the Scientific Committee on Consumer Products (SCCP) have affirmed PPG-3-LAURETH-9's safety for cosmetic use, with concentration limitations up to 3% in leave-on products and 4% in rinse-off products, provided formulations are non-irritating. Manufacturers must implement purification steps to mitigate potential 1,4-dioxane impurities, a byproduct of its ethoxylation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PPG-3-LAURETH-9 is a valuable ingredient, effectively combining emulsifying and surfactant properties with proven anti-itch and skin-conditioning benefits, particularly for dry and sensitive skin, when used within recommended concentrations.
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References
Sources