Nylon-611
AKA “Polyamide 611, Nylon 611, PA 611
Synthetic
Ingredient Facts
Nylon-611
AKA: Polyamide 611, Nylon 611, PA 611
Synthetic · Film Forming · EWG: 4
Synthetic
Occlusive
Synthetic
Clean
Nylon-611 is a polyamide formed by the reaction undecanoic acid with hexylenediamine Science: Functions: Absorbent Safety Ratings: CIR: Safe as used
CAS #
25038-54-4; 25035-04-5; 28774-87-0; 25038-74-8
Form
Powder
See origin →
Functions
Absorbent
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Absorbs Excess Oil
Traditional Use
Synthetic polyamide polymer created in the 1950s for industrial and cosmetic applications. Functions as a film-former and absorbent in makeup and skincare formulations.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR