Science
Mechanism of Action
This ingredient functions as a dry lubricant to minimize particle friction, which significantly enhances the 'slip' and 'glide' of a product during application. On the skin, it establishes a hydrophobic, water-resistant thin film that prevents moisture loss while simultaneously acting as an anti-caking agent and non-aqueous thickener to maintain formula homogeneity.
Research
Clinical Evidence
High confidence1.5%
Key findings
- 01 A 2019 CIR safety assessment established a No-Observed-Adverse-Effect-Level (NOAEL) of 2000 mg/kg/day, confirming a lack of systemic toxicity.
- 02 Human patch testing at 1.5% concentration demonstrated minimal to low irritancy across diverse volunteer groups.
Transparency
Dusting Analysis
As a functional excipient rather than a bioactive 'hero' ingredient, Calcium Stearate is rarely marketed for its own benefits. Its presence is usually indicative of a focus on formula stability and tactile elegance rather than 'label dressing'.
The Formula
Formulation
Stability
Exhibits exceptional thermal stability with a melting point between 140-160°C. It is insoluble in water and cold alcohol but achieves slight solubility in heated vegetable or mineral oils.
Synergies
- Lipid-based emollients
- Mineral pigments
- Oil-in-water emulsifiers
Conflicts
- Strong acids
- Strong oxidizing agents
- Strong alkalis
Safety
Safety Profile
Recognized as safe by the CIR Expert Panel (reaffirmed 2019) and FDA-approved as a food additive (E470a).
Your Skin
Skin Compatibility
Our Assessment
Verdict
An essential formulation tool for achieving superior tactile performance and long-term emulsion stability without compromising skin safety.
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References
Sources