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Polyquaternium-37
AKA “PQ-37, Polyquaternium-37”
Ingredient
Ingredient Facts
Polyquaternium-37
AKA: PQ-37
Ingredient · Film Forming · EWG: 1
Synthetic
Occlusive
Clean
Ethanaminium, N, N, N-trimethyl-2-((2-methyl-1-oxo-2-propenyl)oxy)-, chloride, homopolymer
CAS #
26161-33-1
Form
Powder
See origin →
Functions
Antistatic
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Reduces Static
Creates Protective Barrier
Creates protective layer
Reduces flyaways
Traditional Use
A synthetic polymer developed in the 2000s for use in cosmetic formulations. Designed to provide enhanced conditioning and styling properties with improved substantivity and film formation.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR