Ingredient review
Acrylonitrile/Methyl Methacrylate Crosspolymer
INCI: ACRYLONITRILE/METHYL METHACRYLATE CROSSPOLYMER
A safe, synthetic powder that helps products feel silky and controls shine without clogging pores.
In plain English
This is a man-made plastic-like powder that manufacturers add to cosmetics to make them feel smooth and silky on your skin. It works like a sponge to soak up extra oil and gives a matte, non-greasy finish. You'll find it in powders, foundations, and sunscreens. It's not absorbed into the skin and sits on the surface, so it's generally considered safe and non-irritating.
Quick decision guide
Useful, but context matters
Acrylonitrile/Methyl Methacrylate Crosspolymer 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 Acrylonitrile/Methyl Methacrylate Crosspolymer.
- 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 crosslinked polymer made from acrylonitrile and methyl methacrylate monomers. It is processed into tiny, porous beads that act as absorbents and texture modifiers in cosmetic formulations.
How it works
The porous structure of the polymer particles physically absorbs excess sebum and moisture from the skin's surface. It also helps other ingredients spread evenly and creates a soft-focus effect by scattering light, which can blur the appearance of fine lines and pores.
Pros
Excellent oil absorption
The porous beads soak up excess sebum, helping to keep your skin shine-free for hours without feeling dry or tight.
Smooth, silky feel
It gives powders and creams a luxurious, velvety texture that glides on easily and reduces the cakey look.
Cons and cautions
Synthetic and non-biodegradable
As a plastic-based polymer, it does not break down naturally, which may be a concern for environmentally conscious users.
Not a functional active ingredient
It only provides texture and oil control — it does not hydrate, treat, or improve skin health over time.
Best for
- People with oily or combination skin who want a matte finish
- Anyone looking for a smooth, non-tacky texture in makeup or sunscreen
Use caution if
- Those who strictly avoid synthetic ingredients in their skincare routine
Usage tips
Safety summary
Acrylonitrile/Methyl Methacrylate Crosspolymer is considered safe for topical use in cosmetics. It is not absorbed into the skin, has low irritation and comedogenic potential, and is widely used in makeup and skincare. The monomers used in its production are fully polymerized, meaning they are not present in the final product in any significant amount.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel and other regulatory bodies have concluded that this polymer is safe for use in cosmetics at concentrations up to 50%. No significant skin irritation or sensitization has been reported in clinical studies.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics by the U.S. FDA and the European Commission. No known restrictions at typical use levels.
- Common uses
- Powders, Foundations, Sunscreens, Primers, Masks
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is not classified as a microplastic in all jurisdictions; check local regulations for disposal guidelines.
Good to know
- This ingredient is often used as a replacement for talc in 'talc-free' powders.
- It is considered safe by major regulatory bodies when used in typical cosmetic concentrations.
Common questions
What is Acrylonitrile/Methyl Methacrylate Crosspolymer in beauty products?
This is a man-made plastic-like powder that manufacturers add to cosmetics to make them feel smooth and silky on your skin. It works like a sponge to soak up extra oil and gives a matte, non-greasy finish. You'll find it in powders, foundations, and sunscreens. It's not absorbed into the skin and sits on the surface, so it's generally considered safe and non-irritating.
What does Acrylonitrile/Methyl Methacrylate Crosspolymer do in a beauty product?
The porous structure of the polymer particles physically absorbs excess sebum and moisture from the skin's surface. It also helps other ingredients spread evenly and creates a soft-focus effect by scattering light, which can blur the appearance of fine lines and pores.
Is Acrylonitrile/Methyl Methacrylate Crosspolymer safe for most people?
Acrylonitrile/Methyl Methacrylate Crosspolymer is considered safe for topical use in cosmetics. It is not absorbed into the skin, has low irritation and comedogenic potential, and is widely used in makeup and skincare. The monomers used in its production are fully polymerized, meaning they are not present in the final product in any significant amount.
Who should be careful with Acrylonitrile/Methyl Methacrylate Crosspolymer?
Those who strictly avoid synthetic ingredients in their skincare routine
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.