Ingredient review
Polyquaternium-107
INCI: Polyquaternium-107
Polyquaternium-107 is a gentle conditioning polymer that reduces frizz and static without heavy buildup, making it suitable for fine or oily hair types.
In plain English
Polyquaternium-107 is a synthetic polymer (a long-chain molecule) that coats the surface of hair or skin. It helps reduce static electricity, smooths the hair cuticle, and makes hair feel softer and easier to comb. Because it forms a thin, flexible film, it doesn't weigh hair down as much as some heavier silicones or oils. On skin, it can provide a silky after-feel in cleansers or lotions.
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-107 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-107.
- 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-107 is a cationic (positively charged) polymer belonging to the polyquaternium family. It is designed to bind to negatively charged hair and skin surfaces, providing conditioning and antistatic benefits.
How it works
The positive charge of Polyquaternium-107 attracts it to the negatively charged surface of hair or skin. Once deposited, it forms a thin, flexible film that smooths the cuticle, reduces friction, and neutralizes static charge. This makes hair easier to detangle and less prone to flyaways.
Pros
Lightweight conditioning
Polyquaternium-107 provides a smooth feel and detangling without the heavy, greasy residue that some oils or silicones can leave, making it ideal for fine hair.
Static control
Its antistatic properties help reduce flyaways and frizz, especially in low-humidity environments or after blow-drying.
Cons and cautions
Potential buildup
If used in leave-on products without adequate cleansing, the polymer can accumulate on hair over time, leading to dullness or stiffness.
Environmental concerns
As a synthetic polymer, Polyquaternium-107 may not be readily biodegradable, raising questions about its long-term environmental impact.
Best for
- People with fine or oily hair who want conditioning without heaviness
- Anyone looking to reduce static and frizz in humid or dry climates
Use caution if
- Those with very dry or damaged hair may prefer heavier conditioning agents like oils or silicones for more moisture
Usage tips
Safety summary
Polyquaternium-107 is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, as with all synthetic polymers, environmental persistence is a concern.
Research notes
Studies on polyquaternium compounds generally support their safety and efficacy as conditioning agents. Specific research on Polyquaternium-107 is limited, but it is structurally similar to other well-studied polyquaterniums with a strong safety profile.
Common label clues
- Typical concentration
- 0.1% to 2% in rinse-off products; up to 5% in leave-on formulations
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Conditioners, Leave-in treatments, Styling products, Shampoos, Body washes
- Environmental note
- As a synthetic polymer, its biodegradability is limited. Some formulations may include it in low concentrations to reduce environmental load.
Good to know
- Polyquaternium-107 is often used in combination with other conditioning agents to balance feel and performance.
- It is considered safe for use in cosmetics by major regulatory bodies when used as directed.
Common questions
What is Polyquaternium-107 in beauty products?
Polyquaternium-107 is a synthetic polymer (a long-chain molecule) that coats the surface of hair or skin. It helps reduce static electricity, smooths the hair cuticle, and makes hair feel softer and easier to comb. Because it forms a thin, flexible film, it doesn't weigh hair down as much as some heavier silicones or oils. On skin, it can provide a silky after-feel in cleansers or lotions.
What does Polyquaternium-107 do in a beauty product?
The positive charge of Polyquaternium-107 attracts it to the negatively charged surface of hair or skin. Once deposited, it forms a thin, flexible film that smooths the cuticle, reduces friction, and neutralizes static charge. This makes hair easier to detangle and less prone to flyaways.
Is Polyquaternium-107 safe for most people?
Polyquaternium-107 is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, as with all synthetic polymers, environmental persistence is a concern.
Who should be careful with Polyquaternium-107?
Those with very dry or damaged hair may prefer heavier conditioning agents like oils or silicones for more moisture
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.