Ingredient review
Polyquaternium-61
INCI: Polyquaternium-61
Polyquaternium-61 is a gentle conditioning polymer that reduces static and improves feel in hair and skin products.
In plain English
Polyquaternium-61 is a synthetic polymer that forms a thin, flexible film on hair or skin. This film helps reduce frizz, static electricity, and tangles in hair, while making skin feel smoother and softer. It is a type of quaternary ammonium compound, which means it has a positive charge that helps it stick to negatively charged hair and skin surfaces. Because it is water-soluble, it rinses off easily without leaving heavy buildup.
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
Polyquaternium-61 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 Polyquaternium-61.
- 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
Polyquaternium-61 is a cationic (positively charged) polymer derived from acrylic acid and other monomers. It belongs to the polyquaternium family of conditioning agents widely used in personal care.
How it works
Its positive charge attracts it to the negatively charged surfaces of hair and skin, where it forms a thin, even film. This film smooths the cuticle, reduces friction, and helps retain moisture, leading to softer, more manageable hair and skin.
Pros
Gentle conditioning
Polyquaternium-61 provides noticeable softness and slip without the heavy feel of some oils or silicones, making it suitable for daily use.
Low irritation
It has a low irritation and comedogenic rating, so it is generally safe for sensitive skin and scalp.
Cons and cautions
Potential buildup
On very fine or low-porosity hair, repeated use without clarifying shampoo can lead to a dull or weighed-down appearance.
Synthetic origin
As a synthetic polymer, it may not appeal to those seeking fully natural or biodegradable ingredient lists.
Best for
- People with dry or damaged hair seeking smoothness
- Those with frizz-prone or curly hair
Use caution if
- People with very fine or low-porosity hair who experience buildup
Usage tips
Safety summary
Polyquaternium-61 is considered safe for use in cosmetics at typical concentrations. It has low skin and eye irritation potential and is not known to be sensitizing. No significant safety concerns have been raised by regulatory bodies.
Research notes
Research on polyquaternium-61 is limited compared to more common polyquaterniums, but its safety profile is supported by analogy to similar polymers. It is well-tolerated in human repeat insult patch tests.
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 known restrictions at typical use levels.
- Common uses
- Conditioners, Leave-in treatments, Styling products, Shampoos, Body washes
- Environmental note
- Polyquaternium-61 is not readily biodegradable, so it may persist in water systems. However, it is used in low concentrations and is generally considered low-risk.
Good to know
- Polyquaternium-61 is often used in sulfate-free shampoos to compensate for reduced foaming and conditioning.
- It is compatible with most anionic surfactants, making it versatile in rinse-off and leave-on formulas.
Common questions
What is Polyquaternium-61 in beauty products?
Polyquaternium-61 is a synthetic polymer that forms a thin, flexible film on hair or skin. This film helps reduce frizz, static electricity, and tangles in hair, while making skin feel smoother and softer. It is a type of quaternary ammonium compound, which means it has a positive charge that helps it stick to negatively charged hair and skin surfaces. Because it is water-soluble, it rinses off easily without leaving heavy buildup.
What does Polyquaternium-61 do in a beauty product?
Its positive charge attracts it to the negatively charged surfaces of hair and skin, where it forms a thin, even film. This film smooths the cuticle, reduces friction, and helps retain moisture, leading to softer, more manageable hair and skin.
Is Polyquaternium-61 safe for most people?
Polyquaternium-61 is considered safe for use in cosmetics at typical concentrations. It has low skin and eye irritation potential and is not known to be sensitizing. No significant safety concerns have been raised by regulatory bodies.
Who should be careful with Polyquaternium-61?
People with very fine or low-porosity hair who experience buildup
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.