Quaternium-10

What is Quaternium-10?

Quaternium-10 is a synthetic cationic polymer created by quaternizing hydroxyethylcellulose, a plant-derived cellulose ether modified with ammonium groups for positive charge. It appears as a white, water-soluble powder commonly added to hair care products like conditioners, shampoos, and leave-in treatments. In formulations, it adheres to hair's negatively charged surface via electrostatic attraction, forming a thin lubricating film. This action neutralizes static charges, lowers surface friction between hair strands, and improves slip for better detangling. The polymer's structure also boosts product viscosity and provides subtle antimicrobial effects by disrupting microbial cell membranes, supporting overall formula stability without dominating preservation.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 4 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.
Hair conditioning
Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.
Preservative
Protects the product from microbial contamination during storage and use, helping maintain safety, stability, and shelf life.

Benefits

Reduces static electricity and flyaways in hair products.

Enhances hair softness, shine, and manageability.

Helps protect formulations from microbial growth.

Who It's For

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

Who May Benefit Who Should Avoid
People with frizzy or static-prone hair.
Those allergic to quaternary ammonium compounds.
Users seeking smoother combing in conditioners.
People with sensitive scalps prone to irritation.
Individuals wanting stable, conditioning hair formulas.
Users avoiding ingredients with moderate safety ratings.

Safety Notes

  • Considered safe for rinse-off cosmetic use in safety assessments.
  • Moderate concern rating linked to potential allergenic effects.

Frequently Asked Questions about Quaternium-10

What does Quaternium-10 do in hair products?

Acts as an antistatic agent and conditioner to smooth hair and reduce friction.

Is Quaternium-10 comedogenic?

Rated non-comedogenic, suitable for acne-prone skin concerns.

What are common roles of Quaternium-10?

Antistatic, hair conditioning, and preservative functions in cosmetics.