Science
Mechanism of Action
It functions as a lubricating, thickening, and binding agent, improving spreadability and preventing caking in powders. Its hydrophobic nature also offers mattifying properties by absorbing excess oil and enhancing water resistance.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 CIR Safety Assessment of Zinc Salts (10% in eyeshadow)
- 02 INCIDecoder (3-10% as binder)
Transparency
Dusting Analysis
While safe for topical use, inhalation of fine Zinc Stearate powder, especially in dusting products, may pose respiratory risks. Warnings are recommended to keep out of reach of children and avoid direct inhalation.
The Formula
Formulation
Stability
Zinc Stearate is stable across a pH range of 6.5-8 and is compatible with many ingredients, improving product longevity. However, excessive concentrations may lead to lumpiness or greasiness in formulations.
Synergies
- sodium stearate
- potassium stearate
- calcium stearate
Safety
Safety Profile
The CIR Expert Panel has repeatedly affirmed Zinc Stearate as safe for cosmetic use when formulated to be non-irritating. The FDA also lists it as GRAS; however, inhalation of fine powder requires caution.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Zinc Stearate is a valuable and safe ingredient, highly effective for improving cosmetic texture, stability, and wear, especially in powder formulations due to its mattifying and binding properties.
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