Nylon-66

What is Nylon-66?

Nylon-66 is a synthetic polyamide polymer, specifically polyhexamethylene adipamide, produced through the condensation reaction of hexamethylenediamine and adipic acid. It appears as fine, spherical microbeads or powders in cosmetics, particularly in makeup foundations, powders, cleansers, and creams. These particles function by increasing formulation bulk to improve structure and handling, scattering light to impart opacity for a creamy visual effect, and modifying flow properties to ensure even dispensing and suspension of other ingredients. The uniform spheres provide a silky, dry-touch feel, aiding blendability and aesthetic appeal without altering active performance. In regulatory databases like CosIng, it is approved for these mechanical roles, valued for stability across pH ranges and compatibility in both water- and oil-based systems.

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:

Bulking agent
Increases mass/volume to build structure and improve handling, commonly used to adjust feel, spread, and cost-in-use without acting as a primary active.
Opacifying agent
Makes a formula less transparent to create a creamy, opaque look; can also help visually mask suspended particles and improve aesthetic uniformity.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Improves product texture for smoother, more spreadable application.

Creates opaque, uniform appearance to enhance visual appeal.

Stabilizes viscosity for better formula consistency and handling.

Who It's For

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

Who May Benefit Who Should Avoid
Users preferring silky, matte finishes in makeup and powders.
Those with rare sensitivities to synthetic polymers.
Individuals seeking stable, easy-to-apply cream and lotion textures.
People preferring entirely natural or plastic-free formulations.
People wanting oil-absorbing effects in cleansing or mattifying products.
Individuals with known allergies to polyamides.

Safety Notes

  • Rated safe for cosmetic use by expert reviews with no significant risks.
  • Non-comedogenic and low potential for skin reactions per databases.

Frequently Asked Questions about Nylon-66

Is Nylon-66 safe for skin?

Yes, it holds top safety ratings from regulatory and expert sources with minimal irritation risk.

What products contain Nylon-66?

Common in foundations, powders, cleansers, and creams for texture enhancement.

Does Nylon-66 cause acne?

No, it has a comedogenic rating of zero and does not promote breakouts.