Bis-Isobutyl PEG/PPG-10/7/Dimethicone Copolymer
AKA: Silicone Copolymer, Silicone Blend
Synthetic
Cleanser
Emulsifier
Silicone
Not Clean
Bis-Isobutyl PEG/PPG-10/7/Dimethicone Copolymer is a random copolymer of polyethylene glycol, polypropylene glycol and Dimethicone containing an average of 10 moles of ethylene oxide and 7 moles of propylene oxide
CAS #
158451-77-5
Form
Liquid
State
Solid
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Cleansing Surfactant
Emulsifier
Removes Impurities
Mixes Oil & Water
Traditional Use
A synthetic copolymer formulated in modern cosmetics to improve emulsification and texture in skincare and makeup products, created through mid-to-late 20th century polymer research.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR