Ingredient review
Sodium Acrylates Copolymer
INCI: SODIUM ACRYLATES/VINYL ISODECANOATE CROSSPOLYMER
A safe, synthetic thickener that gives gels and creams a smooth, non-sticky feel without clogging pores.
In plain English
This is a synthetic ingredient that helps skincare products feel thick and luxurious without being greasy. It works by forming a light network in water that traps the liquid, creating a gel-like texture. It's commonly used in serums and moisturizers to improve spreadability and keep the formula stable over time.
Review score
Safety, usefulness, and evidence
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
Quick decision guide
Useful, but context matters
Sodium Acrylates 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging Sodium Acrylates Copolymer.
- 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 high-molecular-weight synthetic polymer made from acrylic acid and vinyl isodecanoate, crosslinked to form a water-swellable powder. When added to water, it hydrates and creates a clear or translucent gel.
How it works
When mixed with water, the polymer particles absorb water and swell, forming a three-dimensional network that thickens the formula. This network also helps suspend other ingredients (like oils or active particles) and prevents them from separating. On the skin, it leaves a light, non-occlusive film that can improve the feel of other ingredients.
Pros
Lightweight texture
Creates a smooth, non-greasy gel that feels light on the skin, ideal for daytime use or under makeup.
Stable formulas
Helps keep water and oil mixed together, so your product doesn't separate or change consistency over time.
Cons and cautions
Synthetic origin
Made from petroleum-derived materials, which may not align with a natural or minimalist skincare philosophy.
Potential tackiness
In some formulas, especially at higher concentrations, it can leave a slightly sticky or tacky feel after application.
Best for
- Anyone who prefers lightweight, non-greasy gel textures
- People with oily or combination skin who want a matte finish
Use caution if
- Those seeking 100% natural or organic skincare ingredients
Usage tips
Safety summary
Sodium Acrylates/Vinyl Isodecanoate Crosspolymer is considered safe for cosmetic use 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 and other bodies have concluded that this polymer is safe when used as intended. Studies show minimal skin penetration and no significant toxicity.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and most other regions. No concentration restrictions for leave-on products.
- 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 ingredient is often used in 'water gel' and 'jelly' type moisturizers.
- It is not absorbed into the skin; it stays on the surface to provide texture and stability.
- It is considered safe for use in leave-on and rinse-off products by global regulators.
Common questions
What is Sodium Acrylates Copolymer in beauty products?
This is a synthetic ingredient that helps skincare products feel thick and luxurious without being greasy. It works by forming a light network in water that traps the liquid, creating a gel-like texture. It's commonly used in serums and moisturizers to improve spreadability and keep the formula stable over time.
What does Sodium Acrylates Copolymer do in a beauty product?
When mixed with water, the polymer particles absorb water and swell, forming a three-dimensional network that thickens the formula. This network also helps suspend other ingredients (like oils or active particles) and prevents them from separating. On the skin, it leaves a light, non-occlusive film that can improve the feel of other ingredients.
Is Sodium Acrylates Copolymer safe for most people?
Sodium Acrylates/Vinyl Isodecanoate Crosspolymer is considered safe for cosmetic use 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 Sodium Acrylates Copolymer?
Those seeking 100% natural or organic skincare ingredients
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.