Science
Mechanism of Action
This ingredient functions as a substituted silica with a dual-action mechanism. As a sulfate, it exhibits potent cleansing and foaming properties, effectively lifting and removing dirt, oils, and product accumulation from the skin's surface. The integrated silica component works by absorbing excess sebum, providing a mattifying effect, and contributing to skin texturization for an optically smoother appearance, diminishing the visibility of pores and fine lines.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
While not typically a 'dusted' ingredient in its application, safety assessments by the CIR Expert Panel emphasize that for products with potential for incidental inhalation, the presence of crystalline silica must be less than 0.1%. Data is insufficient to evaluate its safety for airbrush use, necessitating careful formulation considerations for such applications.
The Formula
Formulation
Safety
Safety Profile
The CIR Expert Panel deems silicate ingredients, including synthetic amorphous and hydrated silica, safe for cosmetic use when formulated to be non-irritating. A key restriction for products with incidental inhalation risk is ensuring crystalline silica content remains below 0.1%, or demonstrating no adverse effects through repeated dose inhalation studies if crystalline silica is at or above 0.1%. EWG indicates low concerns for cancer, allergies & immunotoxicity, developmental & reproductive toxicity, and use restrictions.
Your Skin
Skin Compatibility
Our Assessment
Verdict
SODIUM PROPOXYHYDROXYPROPYL THIOSULFATE SILICA is a valuable multi-functional ingredient, effectively cleansing and mattifying the skin while being well-tolerated by oily and sensitive skin types with a low risk of irritation and comedogenicity.
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References
Sources