Science
Mechanism of Action
On the skin, Stearyl Phosphate operates primarily as a high-performance emulsifier, seamlessly blending immiscible oil and water phases to create stable and homogenous cosmetic formulations. Beyond its structural role, it delivers notable conditioning benefits, imparting a desirable lubricity and silky slip. It also functions as a moisturizer by establishing a delicate, protective film on the epidermal surface, thereby effectively diminishing transepidermal water loss and bolstering the skin's inherent moisture retention capabilities, leading to enhanced hydration and softness.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
No data within the provided research indicates that Stearyl Phosphate is commonly 'dusted' or associated with typical dusting thresholds for ingredients with specific active concentrations.
The Formula
Formulation
Stability
Stearyl Phosphate exhibits excellent emulsification performance within the physiological range of normal skin pH (typically 4.7-5.7) up to a neutral pH of 7, facilitating the development of non-irritating formulations. Phosphate mono- or diesters are generally stable due to their negative charge at physiological pH. In its free acid form, it is soluble in various organic solvents (oil-soluble), whereas its neutralized salts become water-soluble, with solubility improving at increasing pH and elevated temperatures.
Synergies
- Compatible with a wide range of emollients
- Compatible with various surfactants
- Compatible with diverse oils
- Compatible with a broad spectrum of active ingredients
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has assessed Stearyl Phosphate, alongside other alkyl phosphates, concluding it is safe for use in cosmetics under current practices and concentrations, provided formulations are non-irritating. While not possessing individual FDA approval, it is permissible as a component within products that adhere to a broader group standard.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Stearyl Phosphate is a valuable multifunctional ingredient, offering superior emulsification and conditioning benefits while enhancing skin hydration and supporting stable, non-irritating formulations across a healthy pH range.
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