Bis-Isobutyl PEG-13/Dimethicone Copolymer
AKA “Silicone Copolymer, Silicone Blend”
Ingredient
Ingredient Facts
Bis-isobutyl peg-13/dimethicone copolymer
AKA: Silicone Copolymer, Silicone Blend
Ingredient · Not Reported · EWG: 4
Synthetic
Silicone
Not Clean
Bis-Isobutyl PEG-13/Dimethicone Copolymer is a block copolymer made by reacting Bis-Hydrogen Dimethicone with the bis-methallyl ether of PEG-13.
CAS #
197980-52-2
Form
Liquid
State
Solid
See origin →
Functions
Not Reported
Creates smooth skin texture
Helps improve product spreadability
Provides soft
silky feel
Traditional Use
A modern silicone-based copolymer created in the late 20th century to improve texture, spreadability, and wear-time in cosmetic formulations with minimal historical precedent.
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR