Polyquaternium-35
AKA “PQ-35, Polyquaternium-35
Synthetic
Ingredient Facts
Polyquaternium-35
AKA: PQ-35
Synthetic · Film Forming · EWG: 4
Synthetic
Occlusive
Synthetic
Clean
Ethanaminium, N-carboxymethyl-N,N-dimethyl-2-(2-methyl-1-oxo-2-propenyloxy)-, inner salt, polymer with N,N,N-trimethyl-2-(2-methyl-1-oxo-2-propenyloxy)ethanaminium methyl sulfate Science: Functions: Antistatic, Film Forming Safety Ratings: CIR: Safe as used
CAS #
-
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 cationic polymer developed in the 1990s-2000s. Designed to provide superior conditioning and detangling properties in haircare products with improved rinse-off characteristics.
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
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR