Ingredient review
Sodium Polyacrylate Crosspolymer-1
INCI: Sodium Polyacrylate Crosspolymer-1
A safe, synthetic thickener that gives gels and creams a smooth, non-sticky feel without clogging pores.
In plain English
Sodium Polyacrylate Crosspolymer-1 is a synthetic powder that absorbs water and swells into a clear gel. It's used to thicken watery products like serums and gels, giving them a silky, lightweight texture that spreads easily and doesn't feel sticky or greasy. Think of it as a sponge that soaks up liquid to create a smooth, jelly-like consistency.
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 Polyacrylate Crosspolymer-1 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 Polyacrylate Crosspolymer-1.
- 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 crosslinked sodium polyacrylate polymer, meaning it's a long chain of repeating units that are chemically linked together to form a network. This network can absorb and hold many times its weight in water, turning into a gel.
How it works
When added to water, the polymer particles swell and form a three-dimensional network that traps water molecules. This increases the viscosity (thickness) of the product and helps stabilize emulsions by preventing oil and water from separating. It also gives a pleasant, non-tacky feel on the skin.
Pros
Lightweight texture
Creates a silky, non-sticky feel that's ideal for gel-based serums and moisturizers, especially for oily or combination skin.
Effective stabilizer
Helps keep water and oil mixed together in creams and lotions, so the product stays consistent and doesn't separate over time.
Cons and cautions
Synthetic origin
Made from petroleum-derived materials, which may be a turn-off for those committed to natural or eco-friendly beauty routines.
Potential dryness
In high concentrations, it can leave a slightly powdery or dry finish on the skin, which might not suit very dry skin types.
Best for
- People who prefer lightweight, non-greasy gel textures
- Those with oily or combination skin looking for oil-free hydration
Use caution if
- Anyone seeking 100% natural or organic skincare ingredients
Usage tips
Safety summary
Sodium Polyacrylate Crosspolymer-1 is considered safe for topical use. It has a low irritation and comedogenic rating, making it suitable for most skin types, including sensitive skin. No significant safety concerns have been reported in cosmetic concentrations.
Research notes
Research on this specific crosspolymer is limited, but it is closely related to sodium polyacrylate, which has a long history of safe use in cosmetics. Studies indicate it does not penetrate the skin and remains on the surface, reducing any systemic risk.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Approved for cosmetic use globally, including by the U.S. FDA and the European Commission. No known restrictions at typical use levels.
- Common uses
- Gels, Serums, Moisturizers, Sunscreens
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in very small amounts and is not considered a major environmental concern compared to microplastics.
Good to know
- Sodium Polyacrylate Crosspolymer-1 is a more refined version of standard sodium polyacrylate, designed to provide a smoother gel with less tackiness.
- It is often used in 'water gel' or 'jelly' type moisturizers popular in K-beauty.
Common questions
What is Sodium Polyacrylate Crosspolymer-1 in beauty products?
Sodium Polyacrylate Crosspolymer-1 is a synthetic powder that absorbs water and swells into a clear gel. It's used to thicken watery products like serums and gels, giving them a silky, lightweight texture that spreads easily and doesn't feel sticky or greasy. Think of it as a sponge that soaks up liquid to create a smooth, jelly-like consistency.
What does Sodium Polyacrylate Crosspolymer-1 do in a beauty product?
When added to water, the polymer particles swell and form a three-dimensional network that traps water molecules. This increases the viscosity (thickness) of the product and helps stabilize emulsions by preventing oil and water from separating. It also gives a pleasant, non-tacky feel on the skin.
Is Sodium Polyacrylate Crosspolymer-1 safe for most people?
Sodium Polyacrylate Crosspolymer-1 is considered safe for topical use. It has a low irritation and comedogenic rating, making it suitable for most skin types, including sensitive skin. No significant safety concerns have been reported in cosmetic concentrations.
Who should be careful with Sodium Polyacrylate Crosspolymer-1?
Anyone 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.