Ingredient review

Sodium Acrylate Copolymer

INCI: SODIUM ACRYLATE/SODIUM ACRYLOYLDIMETHYL TAURATE COPOLYMER

A safe, synthetic thickener that gives skincare products a silky, lightweight feel without clogging pores.

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In plain English

This is a man-made ingredient that helps skincare products feel smooth and not too runny. It works like a gentle sponge, soaking up extra liquid and turning it into a nice gel. You'll find it in creams, serums, and sunscreens to make them spread easily and feel silky on your skin. It's very unlikely to cause breakouts or irritation.

Review score

Safety, usefulness, and evidence

4.0Good
4.0/ 5

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
How reviews are scored

Quick decision guide

Useful, but context matters

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 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 sodium acrylate and sodium acryloyldimethyl taurate. It's a white powder that swells when mixed with water, creating a gel-like texture.

How it works

When added to a formula, it absorbs water and swells, thickening the product and helping oil and water stay mixed. It also forms a thin, flexible film on the skin that can help other ingredients stay put.

Pros

Lightweight feel

Gives products a silky, non-greasy texture that absorbs quickly, ideal for daytime wear.

Low irritation risk

Rarely causes stinging or redness, making it suitable for sensitive skin types.

Cons and cautions

Synthetic origin

Not natural or biodegradable, which may be a concern for eco-conscious users.

Potential tackiness

In high concentrations, it can leave a slightly sticky or tacky residue on the skin.

Best for

  • Anyone who wants a lightweight, non-greasy moisturizer or serum
  • People with oily or combination skin who dislike heavy creams

Use caution if

  • Those who strictly avoid all synthetic ingredients

Usage tips

Apply to damp skin for better spreadability and faster absorption.
Use a pea-sized amount; a little goes a long way.

Safety summary

Considered safe for topical use with very low irritation and comedogenic potential. No known toxicity or health concerns at typical cosmetic concentrations.

Research notes

Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded this copolymer is safe as used in cosmetics. No significant human or environmental toxicity has been reported.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics worldwide, including by the U.S. FDA and EU CosIng database, with no concentration restrictions.
Common uses
Moisturizers, Serums, Sunscreens, Masks, Makeup
Environmental note
As a synthetic polymer, it is not biodegradable and may accumulate in water systems. Some brands are moving toward bio-based alternatives.

Good to know

  • Often combined with oils or silicones to create a 'velvet' finish.
  • Commonly found in gel-cream moisturizers and mattifying sunscreens.

Common questions

What is Sodium Acrylate Copolymer in beauty products?

This is a man-made ingredient that helps skincare products feel smooth and not too runny. It works like a gentle sponge, soaking up extra liquid and turning it into a nice gel. You'll find it in creams, serums, and sunscreens to make them spread easily and feel silky on your skin. It's very unlikely to cause breakouts or irritation.

What does Sodium Acrylate Copolymer do in a beauty product?

When added to a formula, it absorbs water and swells, thickening the product and helping oil and water stay mixed. It also forms a thin, flexible film on the skin that can help other ingredients stay put.

Is Sodium Acrylate Copolymer safe for most people?

Considered safe for topical use with very low irritation and comedogenic potential. No known toxicity or health concerns at typical cosmetic concentrations.

Who should be careful with Sodium Acrylate Copolymer?

Those who strictly avoid all synthetic ingredients

Research sources

Cosmetic Ingredient Review (CIR) Safety AssessmentOpenEU CosIng DatabaseOpenPubMed - Polymer Safety in CosmeticsOpen

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.