Potassium Bromide
INCI: POTASSIUM BROMIDE
Reviewed by Daisy · Last updated 14 Aug 2026
A viscosity regulator used primarily in formulation rather than for direct skin benefits
Best For Skin Types
All
Usage Frequency
As directed by product instructions
What Is Potassium Bromide?
Potassium bromide is an inorganic salt compound used in cosmetic formulations as a viscosity controlling agent. Its primary role is functional — it helps manufacturers adjust the texture and consistency of skincare products during formulation, rather than serving as an active ingredient with direct benefits to skin.
In cosmetic applications, potassium bromide works behind the scenes to optimise product texture and stability, ensuring consistent performance across batches.
How It Works
Potassium bromide functions as a viscosity controlling agent by influencing the flow properties of a formulation. It modifies how thick or thin a product feels and performs, which can affect how well active ingredients distribute across the skin and how pleasant the product is to apply.
Clinical Evidence & References
There is limited published evidence examining potassium bromide as a skincare ingredient. Most research focuses on systemic use of potassium bromide as an anticonvulsant medication, where it has been associated with rare but serious skin reactions when taken orally at high doses — these findings are not directly relevant to topical skincare use.
In the context of cosmetic formulation, potassium bromide is used at considerably lower concentrations as a functional ingredient rather than an active therapeutic agent, and there are no established safety concerns for typical topical use at these levels.
How to Use
Potassium bromide is a formulation ingredient rather than an active treatment, so usage frequency is determined by the product it appears in. Use according to the instructions provided on your specific product's label. There are no special application techniques required.
Safety & Precautions
Frequently Asked Questions
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