Polyquaternium-11

What is Polyquaternium-11?

Polyquaternium-11 is a synthetic, water-soluble cationic polymer produced by quaternizing a copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate with dimethyl sulfate. Commonly found in hair care products like conditioners, shampoos, leave-in treatments, and styling aids, it works through electrostatic attraction. Its positive charge binds to negatively charged hair surfaces, neutralizing static electricity to ease detangling and enhance slip. As a film former, it deposits a sheer, flexible coating that boosts shine, humidity resistance, and style retention without stiffness. In some rinse-off skin products, it aids in improving texture and reducing friction. This versatile fixative supports product performance by stabilizing emulsions and improving sensory feel during application.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Antistatic agent
Reduces static electricity and flyaways by improving surface conductivity, enhancing hair manageability and smoothness in conditioners and styling products.
Film former
Creates a continuous film on skin or hair to improve wear, water resistance, transfer resistance, shine, or hold in sunscreens, makeup, and styling products.
Hair fixative
Provides style hold by forming a film on hair, helping maintain shape, reduce frizz, and improve durability in sprays, gels, and mousses.

Benefits

Minimizes static electricity and flyaways for easier hair styling.

Deposits a smooth film to enhance shine and manageability.

Offers flexible hold to maintain hairstyles longer.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals with frizzy or static-prone hair seeking better control.
Those with allergies to quaternary ammonium compounds.
Users of styling products needing humidity protection.
Individuals sensitive to synthetic polymers in cosmetics.
People desiring improved comb-through and softness in hair routines.
People prone to contact dermatitis from conditioning agents.

Safety Notes

  • Considered safe for use in cosmetics at typical concentrations.
  • Shows low potential for skin or eye irritation in formulations.

Frequently Asked Questions about Polyquaternium-11

What products commonly contain Polyquaternium-11?

It appears in hair conditioners, shampoos, gels, sprays, and some skin-smoothing lotions.

Is Polyquaternium-11 safe for daily use?

Yes, it is regarded as safe in cosmetics when used as directed, with low hazard ratings.

Does it clog pores?

It has a comedogenic rating of zero, making it unlikely to contribute to pore blockages.