Science
Mechanism of Action
This ingredient works within cosmetic matrices to thicken and stabilize formulations, preventing the separation of oil and liquid phases. By increasing the viscosity of the lipid components, Lithium Stearate contributes to a richer, less transparent product appearance and ensures a consistent, smooth application on the skin. It also imparts water-resistant properties to the final product.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Lithium Stearate presents as a fine white powder, stable under typical temperature and pressure conditions. It exhibits very slight solubility in water (0.09 g/100ml) and ethanol (0.04 g/100ml), sparingly dissolving in methanol, esters, ketones, and vegetable oils. While insoluble in mineral oil at room temperature, it forms a colloid and is soluble in hot mineral oils and waxes, creating a gel upon cooling. Its high melting point of 220-221.5°C provides superior consistency stability compared to other stearate soaps. It decomposes when exposed to strong acids.
Conflicts
- strong acids
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded Lithium Stearate, along with other stearate salts, is safe for use in cosmetics and personal care products, a finding reaffirmed in 2001. While raw material Lithium Stearate can cause minimal to slight skin and eye irritation, particularly at high concentrations or with prolonged exposure, contact from formulated products is generally not associated with harmful health effects under EC Directives. The FDA sanctions its use in certain food contact substances and polymers.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Lithium Stearate is a valuable excipient that significantly enhances the texture, stability, and water resistance of cosmetic formulations, with a well-established safety profile for its intended use.
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