Science
Mechanism of Action
STEARDIMONIUM HYDROXYPROPYL PANTHENYL PEG-7 DIMETHICONE PHOSPHATE CHLORIDE operates via a multi-faceted mechanism. Its dimethicone (silicone) portion creates a breathable, protective film on the skin, enhancing spreadability and exhibiting a non-comedogenic effect. The polyethylene glycol (PEG) component ensures water compatibility and acts as a solubilizer. Additionally, the panthenyl derivative, sourced from Vitamin B5, contributes moisturizing and soothing properties to both skin and hair.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Safety
Safety Profile
This ingredient is associated with significant safety concerns. While individual components like panthenol and stearic acid have favorable safety assessments, the complete complex lacks a specific 'safe as used' conclusion from the CIR. It is listed by California's Proposition 65 as a known carcinogen and reproductive toxicant, affecting both males and females. Animal studies indicate clear evidence of endocrine disruption, and it is suspected of damaging fertility and potentially causing genetic defects or cancer based on EU GHS Hazard Labeling Codes. It also demonstrates environmental persistence and is not anaerobically degradable. Concerns are heightened in inhalable product forms due to respiratory risks and potential contamination from impurities such as Ethylene Oxide and 1,4-Dioxane. The FDA's GRAS designation is limited to its use as a food additive in household cleaners, not for cosmetic applications.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to substantial evidence of reproductive toxicity, endocrine disruption, potential carcinogenicity, and environmental persistence, this ingredient is not suitable for precision skincare formulations.
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References
Sources