Nylon-12/6/66 Copolymer

AKA: Polyamide copolymer, Nylon copolymer 12/6/66

Synthetic

Occlusive

Not Clean

6-Aminohexanoic acid, 12-aminododecanoic acid, 1,6-hexanedioic acid, 1,6-hexanediamine copolymer

CAS #

25038-54-4; 25035-04-5; 28774-87-0; 25038-74-8

Form

Liquid

State

Solid

Functions

Film Forming

Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.

Creates Protective Barrier

Traditional Use

Modern synthetic polymer developed as a blend of nylon types for enhanced cosmetic performance. Used as an absorbent and conditioning agent in powder-based beauty products.

EWG

CIR

Safe as used

Pregnancy

Yes

CIR Safety Findings

medical-approval

all-shades-safe

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

The paper trail

🔬Peer-reviewed1 paper →

⚖️Regulatory1 listing →

🛡️Safety-assessed1 review →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

Verified Jun 2026

Data: CosIng · EWG · CIR