Cetyl Phosphate

What is Cetyl Phosphate?

Cetyl phosphate is a synthetic anionic surfactant formed by esterifying phosphoric acid with cetyl alcohol, a long-chain fatty alcohol typically derived from natural oils or petroleum sources. In cosmetics, it appears mainly in rinse-off and leave-on products such as lotions, shampoos, and moisturizers. Chemically, it acts at the oil-water interface, reducing surface tension to form stable emulsions by creating a protective film around oil droplets dispersed in water. This prevents separation, ensuring smooth textures and even application. Its mild nature supports gentle cleansing without harsh stripping, making it suitable for everyday formulations where consistency and stability matter.

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

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Emulsifying agent
Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.

Benefits

Helps create stable lotions and creams by mixing oil and water phases evenly.

Supports gentle cleansing in washes and shampoos with low irritation potential.

Non-comedogenic, suitable for formulations targeting clearer skin appearance.

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 seeking stable, non-separating emulsion products like daily moisturizers.
Those with rare phosphate ester sensitivities.
Individuals preferring mild surfactants in sensitive-skin cleansers.
People experiencing irritation from similar alkyl surfactants.
Users of acne-prone skincare needing low-comedogenic emulsifiers.
Individuals preferring phosphate-free formulations for personal reasons.

Safety Notes

  • Rated low hazard by safety assessments for cosmetic use.
  • Minimal irritation in typical concentrations per regulatory reviews.

Frequently Asked Questions about Cetyl Phosphate

What is cetyl phosphate used for in skincare?

It emulsifies oil and water in products like creams and cleansers for stable textures.

Is cetyl phosphate safe for sensitive skin?

Safety reviews indicate low irritation potential in cosmetic formulations.

Does cetyl phosphate cause breakouts?

With a comedogenic rating of zero, it poses minimal risk for pore clogging.