Ingredient review
Potassium Carbomer
INCI: Potassium Carbomer
A safe, effective thickener that gives gels and creams a smooth, non-greasy feel without clogging pores.
In plain English
Potassium carbomer is a synthetic powder that, when mixed with water, swells into a clear gel. It helps skincare products feel silky and spread easily, and it keeps the formula stable so ingredients don't separate. You'll find it in many clear gels, serums, and lightweight moisturizers.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Potassium Carbomer is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Potassium Carbomer.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A high-molecular-weight polymer of acrylic acid crosslinked with a polyalkenyl ether, neutralized with potassium hydroxide to form a salt. It is a white, fluffy powder that absorbs water and swells into a gel.
How it works
When added to water, the polymer chains uncoil and absorb water, creating a viscous gel network. This increases the thickness of the product, suspends particles, and stabilizes emulsions by preventing oil and water from separating.
Pros
Non-comedogenic
Potassium carbomer does not clog pores, making it suitable for acne-prone skin.
Versatile texture
It can create anything from a thin lotion to a thick gel, allowing formulators to tailor the feel of a product.
Cons and cautions
Potential stickiness
At high concentrations, products can feel tacky or sticky on the skin, especially in humid conditions.
Salt sensitivity
If a formula contains high levels of electrolytes, the gel may thin out and lose its thickening power.
Best for
- People who prefer lightweight, gel-based moisturizers
- Those with oily or combination skin looking for a matte finish
Use caution if
- Individuals with very dry skin who may prefer richer, oil-based textures
Usage tips
Safety summary
Potassium carbomer is considered safe for topical use. It is not absorbed through the skin, has very low irritation potential, and is not known to be sensitizing. No significant safety concerns have been raised by regulatory bodies.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that carbomers, including potassium carbomer, are safe for use in cosmetics at current practice levels. Studies show no evidence of carcinogenicity, reproductive toxicity, or skin sensitization.
Common label clues
- Typical concentration
- 0.1% to 1%
- Regulatory status
- Approved for use in cosmetics worldwide, including by the U.S. FDA and the European Commission, with no concentration restrictions.
- Common uses
- Gels, Serums, Creams, Lotions
- Environmental note
- As a synthetic polymer, it is not biodegradable, but it is used in very small amounts and is generally considered safe for aquatic life at typical cosmetic concentrations.
Good to know
- Potassium carbomer is often used in place of carbomer when a clearer gel is desired.
- It is pH-sensitive and works best in formulations with a pH between 5.0 and 8.0.
Common questions
What is Potassium Carbomer in beauty products?
Potassium carbomer is a synthetic powder that, when mixed with water, swells into a clear gel. It helps skincare products feel silky and spread easily, and it keeps the formula stable so ingredients don't separate. You'll find it in many clear gels, serums, and lightweight moisturizers.
What does Potassium Carbomer do in a beauty product?
When added to water, the polymer chains uncoil and absorb water, creating a viscous gel network. This increases the thickness of the product, suspends particles, and stabilizes emulsions by preventing oil and water from separating.
Is Potassium Carbomer safe for most people?
Potassium carbomer is considered safe for topical use. It is not absorbed through the skin, has very low irritation potential, and is not known to be sensitizing. No significant safety concerns have been raised by regulatory bodies.
Who should be careful with Potassium Carbomer?
Individuals with very dry skin who may prefer richer, oil-based textures
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.