Hydroxyethyl Cetyldimonium Phosphate

What is Hydroxyethyl Cetyldimonium Phosphate?

Hydroxyethyl Cetyldimonium Phosphate is a synthetic quaternary ammonium compound featuring a long cetyl hydrocarbon chain attached to a dimethylammonium cation, combined with a hydroxyethyl group and phosphate anion. This structure gives it amphiphilic properties, making it effective as a cationic surfactant primarily in hair care formulations like shampoos, conditioners, and detanglers. In products, it works by electrostatically binding to the negatively charged surface of hair keratin, depositing a lubricating layer that smooths the cuticle, minimizes friction between strands, and neutralizes static buildup for better combability. Its surfactant nature also contributes to mild foaming and emulsification, aiding in product texture and rinse-off performance without stripping natural oils excessively. Commonly incorporated at low levels in rinse-off products, it supports overall formula stability and sensory benefits.

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.

Hair conditioning

Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.

Surfactant

Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.

Benefits

Improves hair manageability by reducing friction and tangles.

Neutralizes static electricity for smoother, flyaway-free hair.

Delivers mild cleansing while preserving moisture balance.

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 dry or coarse hair seeking softness.	Those with known allergies to quaternary ammonium compounds.
People experiencing frizz or static in humid conditions.	People with severely damaged or chemically treated scalps.
Users of daily shampoos wanting enhanced conditioning.	Individuals sensitive to phosphate-based surfactants.

Safety Notes

Considered low hazard in cosmetic use levels from safety assessments.
Non-comedogenic, suitable for acne-prone skin in rinse-off products.

Frequently Asked Questions about Hydroxyethyl Cetyldimonium Phosphate

What is Hydroxyethyl Cetyldimonium Phosphate used for?

It serves as an antistatic agent, hair conditioner, and surfactant in hair care products to improve smoothness and reduce static.

Is it safe for daily use?

Safety reviews indicate it's suitable at typical cosmetic concentrations in rinse-off formulations.

Does it clog pores?

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