Polyquaternium-68

What is Polyquaternium-68?

Polyquaternium-68 is a synthetic, water-soluble cationic copolymer primarily composed of methacrylamidopropyl trimethylammonium chloride and vinylpyrrolidone or related monomers. Developed for personal care formulations, it belongs to the polyquaternium family of conditioning polymers commonly found in hair styling products like sprays, gels, mousses, and leave-in treatments. Its positively charged structure enables strong adhesion to the negatively charged hair surface, where it spreads evenly to create a sheer, elastic film. This film enhances style retention by bridging hair strands, reducing flyaways, and shielding against environmental moisture, while maintaining natural movement and adding a subtle sheen. In cosmetic applications, it supports product performance without residue buildup when used as directed.

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:

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 fixing
Improves style retention by depositing film-forming polymers that hold hair in place while balancing stiffness, flexibility, and humidity resistance.
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

Delivers flexible hold to maintain hairstyles throughout the day.

Boosts resistance to humidity for lasting smoothness.

Forms a protective layer that enhances shine and manageability.

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 in humid climates seeking reliable style retention.
Those with confirmed sensitivities to quaternary ammonium compounds.
People with fine or straight hair needing added structure without stiffness.
Individuals experiencing scalp irritation from polymer-based products.
Users of styling products desiring humidity protection and flexibility.
People preferring silicone-free or minimalist hair formulations.

Safety Notes

  • Rated as low hazard in cosmetic safety assessments.
  • Non-comedogenic and suitable for typical use concentrations.

Frequently Asked Questions about Polyquaternium-68

What is Polyquaternium-68 used for?

It acts as a film former and fixative in hair styling products to provide hold and humidity protection.

Is Polyquaternium-68 safe for daily use?

Cosmetic reviews indicate low hazard potential at standard concentrations in rinse-off and leave-on products.

Does it work on all hair types?

It benefits various hair textures, especially those needing flexible style retention in moist conditions.