Ingredient review
Acrylates Crosspolymer-9
INCI: AMP-Acrylates Polyacrylate Crosspolymer-9
A safe, synthetic thickener that gives skincare products a silky, non-sticky feel without clogging pores.
In plain English
This is a man-made ingredient that helps skincare products feel smooth and lightweight. It works like a gentle glue that holds the product together, so it spreads easily and doesn't feel sticky or heavy on your skin. Think of it as the ingredient that gives a gel moisturizer its bouncy, refreshing texture.
Quick decision guide
Useful, but context matters
Acrylates 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 Acrylates 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 derived from acrylic acid and acrylate monomers, chemically modified to form a crosslinked network. It is neutralized with AMP (aminomethyl propanol) to create a stable gel structure.
How it works
When added to water, the polymer chains swell and form a three-dimensional network that thickens the formula. This network also creates a thin, flexible film on the skin's surface after application, helping other ingredients stay in place and reducing water loss without feeling heavy.
Pros
Lightweight texture
Creates a silky, non-sticky feel that absorbs quickly, making it ideal for gel creams and serums used in humid climates or on oily skin.
Low irritation potential
Extensive safety reviews show very low skin irritation and sensitization rates, even at higher use levels, making it suitable for most skin types.
Cons and cautions
Synthetic origin
As a petroleum-derived polymer, it may not appeal to those seeking natural or eco-friendly formulations, and it does not readily biodegrade.
Potential for stinging
On compromised or very sensitive skin, the film-forming nature can sometimes cause a mild, temporary stinging sensation, though this is uncommon.
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 known sensitivity to acrylate polymers (rare)
- Those seeking 100% natural or biodegradable formulas
Usage tips
Safety summary
Considered safe for use in cosmetics at typical concentrations. The Cosmetic Ingredient Review (CIR) panel has reviewed similar acrylate crosspolymers and found them safe when formulated to be non-irritating. Rare reports of mild stinging on sensitive skin exist.
Research notes
Safety data is based on analog studies of related acrylate polymers, which show low acute toxicity and no significant skin irritation or sensitization. Long-term environmental impact data is limited.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Approved for use in cosmetics globally, including by the U.S. FDA and EU CosIng database, with no concentration restrictions.
- Common uses
- Gel moisturizers, Serums, Sunscreens, Makeup primers
- Environmental note
- As a synthetic polymer, it is not biodegradable and may accumulate in aquatic environments. Some manufacturers are exploring bio-based alternatives.
Good to know
- This ingredient is often used in 'water cream' textures that feel like water on the skin.
- It is frequently combined with other polymers to fine-tune the viscosity and sensory feel of a product.
Common questions
What is Acrylates Crosspolymer-9 in beauty products?
This is a man-made ingredient that helps skincare products feel smooth and lightweight. It works like a gentle glue that holds the product together, so it spreads easily and doesn't feel sticky or heavy on your skin. Think of it as the ingredient that gives a gel moisturizer its bouncy, refreshing texture.
What does Acrylates Crosspolymer-9 do in a beauty product?
When added to water, the polymer chains swell and form a three-dimensional network that thickens the formula. This network also creates a thin, flexible film on the skin's surface after application, helping other ingredients stay in place and reducing water loss without feeling heavy.
Is Acrylates Crosspolymer-9 safe for most people?
Considered safe for use in cosmetics at typical concentrations. The Cosmetic Ingredient Review (CIR) panel has reviewed similar acrylate crosspolymers and found them safe when formulated to be non-irritating. Rare reports of mild stinging on sensitive skin exist.
Who should be careful with Acrylates Crosspolymer-9?
Individuals with known sensitivity to acrylate polymers (rare) Those seeking 100% natural or biodegradable formulas
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.