Science
Mechanism of Action
This compound primarily functions as a pH adjuster, establishing and maintaining the desired pH level in cosmetic formulations. Its buffering capabilities contribute to product stability and compatibility with the skin's natural acidic mantle. When dissolved in water, it forms an alkaline solution. Less commonly, it may contribute to mild exfoliation by aiding in the removal of dead skin cells and could exhibit slight oil-absorbing and antiseptic properties, though these direct skin benefits are less extensively researched.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Potassium Carbonate is a highly hygroscopic, odorless, white crystalline powder that readily absorbs atmospheric moisture. When dissolved, a 10% solution yields a strongly alkaline pH of approximately 12. Its stability is indicated in alkaline environments, consistent with its function to establish desired pH levels in formulations.
Conflicts
- Acids (liberates carbon dioxide)
- Lime (forms highly irritating and corrosive caustic potash/KOH in contact with moisture)
- Prolonged contact with aluminum, brass, bronze, copper, lead, tin, zinc, or other alkali-sensitive metals or alloys
Safety
Safety Profile
The CIR Expert Panel deems Potassium Carbonate safe for use in cosmetics when formulated to be non-irritating. It is classified as generally recognized as safe (GRAS) by the U.S. FDA for food and inactive pharmaceutical ingredient use. Pure or highly concentrated forms can be irritating to skin and eyes, potentially causing inflammation or corrosion, and may aggravate pre-existing dermatitis.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Potassium Carbonate is a valuable ingredient for maintaining optimal product stability and skin compatibility through precise pH adjustment and buffering.
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