Potassium Carbonate ●
TL;DR. This ingredient is an alkaline pH adjuster and buffering agent used to raise formula pH, neutralize acids, and support systems that need a mildly basic environment. It may also help control viscosity in some soap and surfactant formulas.
What does Potassium Carbonate do in a cosmetic formula?
This ingredient is an alkaline pH adjuster and buffering agent used to raise formula pH, neutralize acids, and support systems that need a mildly basic environment. It may also help control viscosity in some soap and surfactant formulas.
Is Potassium Carbonate clean?
From a clean-beauty perspective, it is generally accepted and not a common allergen or sensitizer. Its main caveat is concentration-dependent alkalinity, so formulas should be adjusted to a skin-appropriate finished pH.
Is Potassium Carbonate sustainable?
It is typically made from abundant mineral feedstocks through industrial salt-processing routes rather than from petrochemical carbon chains. It is inorganic, water soluble, and does not behave like a persistent organic pollutant, though concentrated releases can shift water pH.
Is Potassium Carbonate COSMOS-approved?
It is permitted in COSMOS natural and organic formulations when used as an appropriate mineral-derived pH adjuster. Its Green Chemistry profile is strongest on low bioaccumulation and simple functionality, but weaker on renewability because the feedstock is mineral rather than plant-derived.
How does Potassium Carbonate work chemically?
This material is an ionic, highly water-soluble inorganic salt with alkaline behavior, producing solutions around pH 11 to 12 at typical laboratory concentrations. In finished products it is usually used at low, q.s. levels for pH adjustment, added gradually in water because it can raise pH quickly and can affect preservative efficacy, surfactant viscosity, and acid-sensitive actives.
Last updated 2026-05-14