Ingredient review
Polyacrylate Crosspolymer-9
INCI: Polyacrylate Crosspolymer-9
A reliable synthetic thickener that improves product feel and stability with a very low risk of irritation.
In plain English
Polyacrylate Crosspolymer-9 is a man-made ingredient used to thicken and stabilize skincare formulas. It helps create that smooth, non-greasy gel texture you might feel in serums or lightweight moisturizers. Think of it as a structural helper that keeps the product consistent and easy to spread, without clogging pores or causing irritation for most people.
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
Polyacrylate Crosspolymer-9 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 Polyacrylate Crosspolymer-9.
- 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 synthetic polymer made from acrylic acid monomers that are crosslinked to form a network. It is designed to absorb water and swell, creating a gel-like consistency in cosmetic products.
How it works
When added to water, the polymer particles absorb liquid and expand, forming a three-dimensional network that thickens the formula. This network also helps suspend other ingredients and stabilizes emulsions, preventing oil and water from separating.
Pros
Excellent texture enhancer
Provides a silky, non-greasy feel that spreads easily, making it ideal for lightweight gels and serums.
Very low irritation risk
Rarely causes skin reactions, so it is generally safe for sensitive skin types when used at typical concentrations.
Cons and cautions
Synthetic origin
Made from petroleum-derived acrylic acid, which may be a concern for those seeking natural or biodegradable ingredients.
Potential tackiness
If the concentration is too high or the formula is not balanced, it can leave a slightly sticky or tacky residue on the skin.
Best for
- People who prefer lightweight, gel-based moisturizers or serums
- Those with oily or combination skin looking for non-greasy textures
Use caution if
- Individuals seeking exclusively natural or plant-derived ingredients
Usage tips
Safety summary
Polyacrylate Crosspolymer-9 is considered safe for cosmetic use. It has a low potential for skin irritation and is non-comedogenic, meaning it is unlikely to clog pores. No significant safety concerns have been raised by regulatory bodies.
Research notes
Research on this specific polymer is limited, but it is closely related to other polyacrylate crosspolymers that have been reviewed by the Cosmetic Ingredient Review (CIR) panel and found safe for use in cosmetics at typical concentrations.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. No known restrictions at typical usage levels.
- Common uses
- Gels, Serums, Creams, Lotions
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in very small amounts and is not considered a major environmental concern compared to microplastics.
Good to know
- Polyacrylate Crosspolymer-9 is often used in 'water gel' formulas that feel refreshing and absorb quickly.
- It is compatible with a wide range of pH levels, making it versatile for different product types.
Common questions
What is Polyacrylate Crosspolymer-9 in beauty products?
Polyacrylate Crosspolymer-9 is a man-made ingredient used to thicken and stabilize skincare formulas. It helps create that smooth, non-greasy gel texture you might feel in serums or lightweight moisturizers. Think of it as a structural helper that keeps the product consistent and easy to spread, without clogging pores or causing irritation for most people.
What does Polyacrylate Crosspolymer-9 do in a beauty product?
When added to water, the polymer particles absorb liquid and expand, forming a three-dimensional network that thickens the formula. This network also helps suspend other ingredients and stabilizes emulsions, preventing oil and water from separating.
Is Polyacrylate Crosspolymer-9 safe for most people?
Polyacrylate Crosspolymer-9 is considered safe for cosmetic use. It has a low potential for skin irritation and is non-comedogenic, meaning it is unlikely to clog pores. No significant safety concerns have been raised by regulatory bodies.
Who should be careful with Polyacrylate Crosspolymer-9?
Individuals seeking exclusively natural or plant-derived ingredients
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.