Ingredient review
Sodium Acrylic Acid/MA Copolymer
INCI: SODIUM ACRYLIC ACID/MA COPOLYMER
A safe synthetic thickener that helps products spread smoothly and feel lightweight on skin.
In plain English
Sodium Acrylic Acid/MA Copolymer is a man-made ingredient that helps skincare products have a nice, smooth texture. It acts like a gentle glue that holds the product together and creates a thin, invisible film on your skin. This film can help other ingredients stay put and make your skin feel soft without being sticky or heavy. Think of it as the ingredient that makes your lotion or serum feel silky and spread easily.
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 Acrylic Acid/MA 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 Acrylic Acid/MA 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 synthetic polymer made from acrylic acid and maleic acid, neutralized with sodium. It is a white powder that is added to water-based formulas to thicken them and improve their feel on the skin.
How it works
When mixed with water, the polymer chains unwind and entangle, increasing the viscosity of the product. It also forms a flexible film when the water evaporates, which can help lock in moisture and create a smooth surface on the skin or hair.
Pros
Lightweight feel
Creates a silky, non-greasy texture that absorbs quickly, making it ideal for daytime moisturizers and serums.
Improves product stability
Helps keep the formula from separating and maintains a consistent texture from first use to last.
Cons and cautions
Synthetic origin
Derived from petroleum-based chemicals, which may be a concern for those seeking natural or biodegradable ingredients.
Potential tackiness
In high concentrations or with certain other ingredients, it can leave a slightly sticky or tacky residue on the skin.
Best for
- Anyone who likes lightweight, non-greasy moisturizers
- People with oily or combination skin looking for a matte finish
Use caution if
- Those strictly avoiding all synthetic ingredients
- Individuals with known sensitivity to acrylic polymers (rare)
Usage tips
Safety summary
Sodium Acrylic Acid/MA Copolymer is considered safe for topical use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin.
Research notes
Research on this specific copolymer is limited, but it is structurally similar to other well-studied acrylic polymers used in cosmetics. These polymers are generally recognized as safe and effective for thickening and film-forming purposes.
Common label clues
- Typical concentration
- 0.1% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other countries. The Cosmetic Ingredient Review (CIR) panel has deemed similar acrylic copolymers safe as used in cosmetics.
- Common uses
- Serums, Moisturizers, Sunscreens, Hair styling products
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in low concentrations and is not known to accumulate in the environment in significant amounts.
Good to know
- This ingredient is often used in combination with other thickeners to achieve the perfect texture.
- It is considered safe for use in leave-on and rinse-off products by major regulatory bodies.
Common questions
What is Sodium Acrylic Acid/MA Copolymer in beauty products?
Sodium Acrylic Acid/MA Copolymer is a man-made ingredient that helps skincare products have a nice, smooth texture. It acts like a gentle glue that holds the product together and creates a thin, invisible film on your skin. This film can help other ingredients stay put and make your skin feel soft without being sticky or heavy. Think of it as the ingredient that makes your lotion or serum feel silky and spread easily.
What does Sodium Acrylic Acid/MA Copolymer do in a beauty product?
When mixed with water, the polymer chains unwind and entangle, increasing the viscosity of the product. It also forms a flexible film when the water evaporates, which can help lock in moisture and create a smooth surface on the skin or hair.
Is Sodium Acrylic Acid/MA Copolymer safe for most people?
Sodium Acrylic Acid/MA Copolymer is considered safe for topical use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for most skin types, including sensitive skin.
Who should be careful with Sodium Acrylic Acid/MA Copolymer?
Those strictly avoiding all synthetic ingredients Individuals with known sensitivity to acrylic polymers (rare)
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.