Ingredient review

Ammonium Acryloyldimethyltaurate/Vinyl Formamide Copolymer

INCI: AMMONIUM ACRYLOYLDIMETHYLTAURATE/VINYL FORMAMIDE COPOLYMER

A safe, effective synthetic thickener that gives water-based products a smooth, non-sticky feel without clogging pores.

beautyskincarethickener

In plain English

This ingredient is a synthetic polymer—a long chain of repeating molecules—that helps thicken water-based skincare products like gels, serums, and creams. It works by swelling in water and creating a network that traps liquid, giving the product a smooth, spreadable texture without feeling heavy or sticky. It also helps keep oil and water mixed together so the formula stays stable.

Quick decision guide

Useful, but context matters

Ammonium Acryloyldimethyltaurate/Vinyl Formamide 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 Ammonium Acryloyldimethyltaurate/Vinyl Formamide 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 high-molecular-weight synthetic copolymer made from acryloyldimethyltaurate and vinyl formamide monomers. It is produced through controlled polymerization and is supplied as a powder or liquid dispersion.

How it works

When added to water, the polymer chains unwind and absorb water, increasing the viscosity of the solution. The charged groups on the polymer help stabilize emulsions by forming a protective film around oil droplets, preventing them from merging. This results in a smooth, creamy texture that is easy to apply and leaves a non-greasy finish.

Pros

Lightweight texture

Creates a smooth, non-greasy feel that absorbs quickly, making it ideal for gel-based moisturizers and serums.

Excellent stability

Helps keep oil and water mixed, so your product stays uniform and effective from first use to last.

Cons and cautions

Synthetic origin

As a man-made polymer, it may not be preferred by those seeking 100% natural or organic formulations.

Potential tackiness at high levels

If used in very high concentrations, the product may feel slightly sticky or tacky on the skin.

Best for

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

Use caution if

  • Those who strictly avoid all synthetic ingredients in their skincare

Usage tips

Use in water-based formulas at 0.1–2% for best texture without stickiness.
Add slowly while mixing to avoid clumping and ensure even dispersion.
Can be used alongside other thickeners to fine-tune the feel of your product.

Safety summary

Ammonium Acryloyldimethyltaurate/Vinyl Formamide Copolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types, including sensitive skin.

Research notes

Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that this polymer is safe for use in cosmetic products. Studies show it is not a significant skin irritant or sensitizer. Its primary function is as a thickener and stabilizer, with no known active skin benefits.

Common label clues

Typical concentration
0.1% to 2%
Regulatory status
Approved for use in cosmetics in the EU, US, and many other regions. Considered safe at typical use levels by the Cosmetic Ingredient Review (CIR) panel.
Common uses
Gels, Serums, Creams, Lotions, Sunscreens
Environmental note
As a synthetic polymer, it is not biodegradable. However, it is used in very small amounts and is not known to bioaccumulate.

Good to know

  • This polymer is often used in 'gel-cream' textures that are popular for oily skin.
  • It is compatible with a wide range of active ingredients, including acids and salts.

Common questions

What is Ammonium Acryloyldimethyltaurate/Vinyl Formamide Copolymer in beauty products?

This ingredient is a synthetic polymer—a long chain of repeating molecules—that helps thicken water-based skincare products like gels, serums, and creams. It works by swelling in water and creating a network that traps liquid, giving the product a smooth, spreadable texture without feeling heavy or sticky. It also helps keep oil and water mixed together so the formula stays stable.

What does Ammonium Acryloyldimethyltaurate/Vinyl Formamide Copolymer do in a beauty product?

When added to water, the polymer chains unwind and absorb water, increasing the viscosity of the solution. The charged groups on the polymer help stabilize emulsions by forming a protective film around oil droplets, preventing them from merging. This results in a smooth, creamy texture that is easy to apply and leaves a non-greasy finish.

Is Ammonium Acryloyldimethyltaurate/Vinyl Formamide Copolymer safe for most people?

Ammonium Acryloyldimethyltaurate/Vinyl Formamide Copolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types, including sensitive skin.

Who should be careful with Ammonium Acryloyldimethyltaurate/Vinyl Formamide Copolymer?

Those who strictly avoid all synthetic ingredients in their skincare

Research sources

Cosmetic Ingredient Review (CIR) Safety AssessmentOpenEuropean Chemicals Agency (ECHA) InformationOpenPersonal Care Council - Ingredient DatabaseOpen

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.