Polyquaternium-5

What is Polyquaternium-5?

Polyquaternium-5 is a water-soluble synthetic polymer from the polyquaternium class, formed by copolymerizing acrylamide with beta-methacryloyloxyethyl trimethyl ammonium methosulfate, a quaternary ammonium compound. Its positive charge enables strong adhesion to negatively charged hair cuticles and skin. Commonly used in hair conditioners, shampoos, styling gels, mousses, and sprays, it works by creating a lightweight, flexible sheath around hair strands. This sheath minimizes friction between hairs, neutralizes surface charges to prevent static buildup, and delivers a smooth texture. In product formulas, it boosts conditioning effects, enhances slip for easier detangling, and contributes to humidity resistance and gloss without greasiness. Its film-forming nature also aids in prolonging style durability across rinse-off and leave-on applications.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 2-3 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 tangle-free, smooth hair

Deposits a sheer film to boost shine and manageability

Supports hairstyle retention in styling formulations

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 flyaway or frizzy hair
Those with allergies to quaternary ammonium compounds
Users needing enhanced conditioning in daily routines
Individuals sensitive to synthetic polymers
People applying styling products for lasting hold
Users preferring silicone-free or natural-only formulas

Safety Notes

  • Deemed safe for use in cosmetics at typical concentrations
  • Presents low risk of irritation to skin or eyes

Frequently Asked Questions about Polyquaternium-5

What is Polyquaternium-5 used for?

It serves as an antistatic agent, film former, and hair fixative mainly in shampoos, conditioners, and styling aids.

Is Polyquaternium-5 comedogenic?

It carries a comedogenic rating of 0, indicating low likelihood of pore clogging.

What is the safety profile of Polyquaternium-5?

Rated low hazard by EWG (2-3), with assessments confirming safety in cosmetic applications.