Science
Mechanism of Action
This ingredient operates primarily as a pH regulator, stabilizing cosmetic formulations and supporting the skin's natural acidic mantle. Additionally, it performs as a gentle exfoliant, promoting mild cellular turnover without harshness.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Potassium Sodium Tartrate, or Rochelle salt, exhibits optimal stability and function within a pH range of 6.0 to 8.5, with a 5% aqueous solution typically measuring between pH 7.0-8.5. It demonstrates high solubility in water, with solubility increasing from 26 g/100 mL at 0°C to 66 g/100 mL at 26°C, but is insoluble in ethanol.
Conflicts
- Can hydrolyze in the presence of strong acids or bases, potentially forming tartaric acid and corresponding potassium and sodium salts.
Safety
Safety Profile
The safety of Potassium Sodium Tartrate has been affirmed by the Food and Drug Administration (FDA) as Generally Recognized as Safe (GRAS) for direct food use and is approved for use in OTC antacid drugs. The Cosmetic Ingredient Review (CIR) Expert Panel has deferred its own evaluation, relying on the extensive FDA assessment. Environment Canada classifies it as not expected to be potentially toxic or harmful, indicating a favorable safety profile for cosmetic applications.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Potassium Sodium Tartrate is a valuable multifunctional ingredient, offering effective pH regulation, gentle exfoliation, and mild humectancy, complemented by a strong safety record and low irritancy and comedogenicity.
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