Ingredient review

Acrylamide/Sodium Acrylate Copolymer

INCI: ACRYLAMIDE/SODIUM ACRYLATE COPOLYMER

A safe, effective thickener that gives products a smooth, lightweight feel, but its synthetic origin and potential for trace acrylamide residue raise minor concerns.

beautyskincarethickener

In plain English

This is a synthetic ingredient that helps make lotions and creams feel smooth and not watery. It works by forming a gel-like network that thickens the product and helps other ingredients spread evenly. It's very common in gel-based moisturizers and sunscreens because it creates a light, non-greasy texture. While it's generally considered safe, it's made from acrylamide, a chemical that in large amounts can be toxic, but the tiny amounts used in cosmetics are well below safety limits.

Quick decision guide

Useful, but context matters

Acrylamide/Sodium Acrylate Copolymer 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Acrylamide/Sodium Acrylate Copolymer.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic copolymer made from acrylamide and sodium acrylate monomers, used primarily as a thickening and stabilizing agent in cosmetic formulations.

How it works

When mixed with water, it swells and forms a three-dimensional network that traps water, increasing the viscosity of the product. This gives a smooth, gel-like texture and helps keep other ingredients evenly dispersed, preventing separation.

Pros

Lightweight texture

Creates a smooth, non-greasy feel that works well for oily or combination skin types.

Stable formulations

Helps prevent product separation and maintains consistency over time, even in sunscreens.

Cons and cautions

Synthetic origin

Made from petrochemicals, which may be a concern for those seeking natural or eco-friendly products.

Trace impurity risk

Residual acrylamide monomer can be present, though cosmetic-grade versions are purified to very low levels considered safe by regulators.

Best for

  • Anyone looking for lightweight, gel-based moisturizers or sunscreens
  • People with oily or combination skin who prefer non-greasy textures

Use caution if

  • Those who strictly avoid synthetic ingredients
  • Individuals with known acrylamide sensitivity (rare)

Usage tips

Use in gel-based products for a lightweight feel
Combine with other thickeners for customized texture
Store products in cool, dry place to maintain stability

Safety summary

Generally recognized as safe in cosmetics at typical use levels. Regulatory bodies (EU, US FDA, Japan) allow its use with strict purity standards to minimize acrylamide residue. Skin irritation and allergy are rare.

Research notes

Studies confirm low skin irritation and sensitization potential. The main safety focus is on residual acrylamide, but cosmetic-grade material is highly purified. No significant evidence of harm from topical use.

Common label clues

Typical concentration
0.1% to 5%
Regulatory status
Approved for use in cosmetics globally, with limits on residual acrylamide (e.g., ≤0.1 ppm in EU and US).
Common uses
Moisturizers, Serums, Sunscreens, Hair products
Environmental note
Synthetic polymer; not biodegradable, but used in small amounts. Some concerns about microplastic accumulation, though it is not classified as a microplastic by all definitions.

Good to know

  • Often used in 'gel cream' formulas for a refreshing sensation
  • Can be found in both leave-on and rinse-off products

Common questions

What is Acrylamide/Sodium Acrylate Copolymer in beauty products?

This is a synthetic ingredient that helps make lotions and creams feel smooth and not watery. It works by forming a gel-like network that thickens the product and helps other ingredients spread evenly. It's very common in gel-based moisturizers and sunscreens because it creates a light, non-greasy texture. While it's generally considered safe, it's made from acrylamide, a chemical that in large amounts can be toxic, but the tiny amounts used in cosmetics are well below safety limits.

What does Acrylamide/Sodium Acrylate Copolymer do in a beauty product?

When mixed with water, it swells and forms a three-dimensional network that traps water, increasing the viscosity of the product. This gives a smooth, gel-like texture and helps keep other ingredients evenly dispersed, preventing separation.

Is Acrylamide/Sodium Acrylate Copolymer safe for most people?

Generally recognized as safe in cosmetics at typical use levels. Regulatory bodies (EU, US FDA, Japan) allow its use with strict purity standards to minimize acrylamide residue. Skin irritation and allergy are rare.

Who should be careful with Acrylamide/Sodium Acrylate Copolymer?

Those who strictly avoid synthetic ingredients Individuals with known acrylamide sensitivity (rare)

Research sources

Cosmetic Ingredient Review (CIR) Safety AssessmentOpenEuropean Chemicals Agency (ECHA) InformationOpenPubMed - Acrylamide in cosmetics reviewOpen

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.