Ingredient review
Polyquaternium-74
INCI: Polyquaternium-74
A gentle conditioning polymer that smooths hair and skin without heavy buildup, ideal for sensitive scalps and fine hair.
In plain English
Polyquaternium-74 is a positively charged polymer that sticks to negatively charged hair and skin surfaces. It forms a thin, flexible film that reduces frizz, adds slip, and helps retain moisture. Unlike some older quaternary compounds, it is designed to be less irritating and more compatible with sensitive skin.
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-74 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-74.
- 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 cationic polymer belonging to the polyquaternium family, engineered to provide conditioning and antistatic benefits in rinse-off and leave-on products.
How it works
Its positive charge binds to the negatively charged surface of hair and skin, depositing a smooth, protective layer. This reduces static electricity, improves wet and dry combing, and enhances the sensory feel of formulations.
Pros
Gentle conditioning
Provides smoothness and slip without the irritation sometimes seen with older cationic polymers, making it suitable for sensitive skin and scalps.
Frizz control
Effectively reduces static electricity and flyaways, leaving hair more manageable and polished.
Cons and cautions
Potential buildup
On very fine or low-porosity hair, repeated use may lead to a slight coating that can weigh hair down over time.
Not biodegradable
As a synthetic polymer, it does not readily break down in the environment, which may be a concern for eco-conscious users.
Best for
- People with fine or easily tangled hair
- Those with sensitive scalps or skin
Use caution if
- Individuals who prefer fully biodegradable ingredients
Usage tips
Safety summary
Polyquaternium-74 has a low irritation and comedogenic risk. It is considered safe for use in cosmetics at typical concentrations, with no significant safety concerns reported in regulatory reviews.
Research notes
Studies on polyquaternium polymers generally support their safety and efficacy as conditioning agents. Specific data on Polyquaternium-74 is limited, but its chemical structure is similar to other well-studied polyquaterniums with favorable safety profiles.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Approved for cosmetic use in the EU, US, and most major markets. No known restrictions at typical use levels.
- Common uses
- Conditioners, Leave-in treatments, Styling products, Body washes
- Environmental note
- As a synthetic polymer, it is not readily biodegradable. Some manufacturers are exploring more eco-friendly alternatives.
Good to know
- Polyquaternium-74 is often chosen for its lower irritation profile compared to older quaternary ammonium compounds.
- It works well in both clear and opaque formulations.
Common questions
What is Polyquaternium-74 in beauty products?
Polyquaternium-74 is a positively charged polymer that sticks to negatively charged hair and skin surfaces. It forms a thin, flexible film that reduces frizz, adds slip, and helps retain moisture. Unlike some older quaternary compounds, it is designed to be less irritating and more compatible with sensitive skin.
What does Polyquaternium-74 do in a beauty product?
Its positive charge binds to the negatively charged surface of hair and skin, depositing a smooth, protective layer. This reduces static electricity, improves wet and dry combing, and enhances the sensory feel of formulations.
Is Polyquaternium-74 safe for most people?
Polyquaternium-74 has a low irritation and comedogenic risk. It is considered safe for use in cosmetics at typical concentrations, with no significant safety concerns reported in regulatory reviews.
Who should be careful with Polyquaternium-74?
Individuals who prefer fully biodegradable 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.