PEG/PPG-15/5 Dimethicone
AKA: Silicone Glycol Copolymer, Dimethicone Copolyol
Synthetic
Cleanser
Emulsifier
Silicone
Not Clean
PEG/PPG-15/5 Dimethicone is the alkoxylated derivative of Dimethicone containing an average of 15 moles of ethylene oxide and 5 moles of propylene oxide
CAS #
-
Form
Liquid
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emulsifier
Mixes Oil & Water
Traditional Use
A modern synthetic silicone-based ingredient developed for the cosmetics industry in the late 20th century. Created to enhance texture, conditioning, and sensory properties in skincare products.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
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