Ingredient dictionary

Ammonium Acryloyldimethyltaurate/VP Copolymer

A synthetic polymer, a long chain-like molecule built from two building blocks, used mainly to thicken and stabilize water-based formulas. It is on the label of 31 products in our library. Checked against our library November 6, 2026.

What Ammonium Acryloyldimethyltaurate/VP Copolymer does

Thickens water-based creams, gels and lotions
Keeps oil and water blends from separating
Gives a smooth, cushiony, slightly slick feel

Ammonium Acryloyldimethyltaurate/VP Copolymer is a man-made polymer. Chemists make it by linking small building blocks, one based on a sulfonic acid group, which loves water, and one called vinylpyrrolidone, into a long chain. The ammonium is a salt form that lets the chain swell up in water.

Formulators use it because it thickens water-based products without making them greasy. Once it swells, the chains tangle and hold liquid in place, so creams and gels stay smooth and evenly mixed. On the skin it feels soft and slightly slick, and it leaves a light, cushiony feel.

Good for

Suits lightweight gels and creams that need a smooth texture and stable, even consistency.

Frequently asked questions

Is Ammonium Acryloyldimethyltaurate/VP Copolymer safe for sensitive skin?

It is generally well tolerated and is used in many creams and gels. Like any ingredient, a small number of people may react to it. If your skin is sensitive, patch test a new product on your inner arm first and stop using it if irritation appears.

Is it the same as silicone?

No. Silicones are built on a silicon backbone and are mainly used for slip. This polymer is built on carbon chains and is mainly a thickener, so it works differently in a formula.