Polyurethane-72
AKA “Film-forming polymer
Synthetic
Ingredient Facts
Polyurethane-72
AKA: Film-forming polymer
Synthetic · Film Forming · EWG: 4
Synthetic
Occlusive
Skin Conditioner
Synthetic
Clean
Helps nail polish stay put and creates a protective, long-lasting finish that resists chipping and peeling.
CAS #
502761-95-7
Form
Powder
See origin →
Functions
Binding
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Nail Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Holds Formula Together
Creates Protective Barrier
Creates protective layer
Strengthens nails
Holds ingredients together
Traditional Use
A synthetic polymer developed in the mid-20th century for industrial applications. Used in cosmetics as a film-forming agent and texture modifier in formulations like foundations and primers.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe w/Qualifications
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR
Polyurethane-72 — Duck Heart Ghost