Science
Mechanism of Action
This ingredient functions as an amphiphilic surfactant and emulsifier, skillfully binding water and oil to create stable and harmonious cosmetic formulations. It reduces the surface tension of a product, ensuring smooth and uniform application across the skin. In cleansing applications, it delivers a gentle yet effective purification, preserving the skin's inherent moisture barrier from excessive stripping. Notably, Laureth-7 Citrate can minimize irritation potential from other surfactants and active ingredients, thus acting as a formula stabilizer. It actively supports the skin's barrier function by drawing in moisture and reducing transepidermal water loss. For leave-on products, it serves as an emollient and moisturizer, refining skin texture and providing essential hydration. Additionally, its chelating properties contribute to overall formula stability and enhance ingredient efficacy.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 No signs of irritation or sensitisation were observed in a human repeated insult patch test (RIPT) at a 10% concentration.
- 02 An in vitro eye irritation study reported none to slight eye irritation potential at a 5% concentration.
- 03 Recommended concentrations vary by application: 0.1-1.0% for leave-on products, 1.0-5.0% for shower products, and generally <5% when utilized as an emulsifier.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Laureth-7 Citrate is expected to be stable under standard conditions. It can withstand heating during mixing, though temperatures exceeding 80°C should be avoided. Storage below 20°C may lead to turbidity or crystallization, a condition that does not impair product quality and can be reversed by gently heating to approximately 40°C.
Synergies
- Functions as an anti-irritant, reducing potential irritation from other surfactants and active ingredients.
- Acts as a formula stabilizer, enhancing overall product integrity.
Conflicts
- No specific incompatibilities identified, but its surfactant properties may augment the dermal penetration of other chemicals in the formulation.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) panel assessed Laureth-7 (the ethoxylated alcohol constituent) and deemed it safe for use with concentration or use limitations. Laureth-7 Citrate itself demonstrated no irritation or sensitization at 10% in human patch tests and only minor eye irritation at 5% in vitro. The citric acid component is classified as Generally Recognized As Safe (GRAS). However, as an ethoxylated ingredient, there are potential concerns regarding trace impurities like 1,4-dioxane and ethylene oxide, which are associated with the Laureth-7 component. The SCCS (Scientific Committee on Consumer Safety) indicated in 2011 that there was insufficient data to fully evaluate the safe use of Laureth-7 (the alcohol ethoxylate) in cosmetic products at that time.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Laureth-7 Citrate is a valuable, multi-functional ingredient offering gentle cleansing, emulsification, and skin conditioning benefits across all skin types, supported by good safety data up to 10% usage.
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