Polyquaternium-24

What is Polyquaternium-24?

Polyquaternium-24 is a synthetic quaternary ammonium polymer, specifically a copolymer featuring quaternized vinylpyrrolidone and methacrylamidopropyltrimonium chloride units. This positively charged ingredient is commonly found in hair care products like conditioners, leave-in treatments, and styling gels. Its cationic nature allows it to adhere to the negatively charged keratin in hair, creating a conditioning layer that modifies surface properties. By improving electrical conductivity, it neutralizes static buildup, while its film-forming ability delivers a smooth sheath for enhanced texture and structure retention. Primarily used at low levels in rinse-off and leave-on formulations, it supports product performance without heavy residue.

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

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 for easier hair combing and reduced flyaways.

Deposits a lightweight film to boost shine and style longevity.

Enhances hair smoothness and manageability in daily routines.

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.
Those with rare sensitivity to quaternary polymers.
Users of styling products needing humidity-resistant hold.
Individuals preferring silicone- and polymer-free formulas.
People seeking conditioning effects in shampoos and conditioners.
People experiencing scalp irritation from conditioning agents.

Safety Notes

  • Low hazard rating from environmental health assessments.
  • Recognized as safe for use in cosmetics by expert review panels.

Frequently Asked Questions about Polyquaternium-24

What does Polyquaternium-24 do in hair products?

It acts as an antistatic agent, film former, and fixative to smooth hair, control flyaways, and maintain styles.

Is Polyquaternium-24 safe for skin and hair?

It carries a low safety rating and is approved for cosmetic use with minimal irritation concerns.

Does it clog pores?

Rated non-comedogenic, making it suitable for scalp and skin-contact products.