PEG-2 Diisononanoate
molecular structure · PubChem
AKA: Diethylene glycol dipelargonate, Diethylene glycol dinonanoate, Nonanoic acid, Oxydi-2, 1-ethanediyl ester, Oxydiethylene dinonanoate, PLASTOLEIN 9055, 1'-(oxydi-2, 1-ethanediyl) ester, PELARGONIC ACID DIETHYLENE GLYCOL ESTER
Synthetic
Cleanser
Emulsifier
Not Clean
Poly(oxy-1,2-ethanediyl), .alpha.-(1-oxoisononyl)-.omega.-[(1-oxoisononyl)oxy]- (2 mol EO average molar ratio)
Formula
C22H42O5
Mol. Weight
386.60
Form
Liquid
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emulsifier
Reduces Inflammation
Wound Healing
Fights Bacteria
Mixes Oil & Water
Traditional Use
A synthetic polyethylene glycol ester developed in the latter half of the 20th century. Created as a lightweight emollient and skin conditioning agent with improved stability over traditional plant oils.
EWG
4
CIR
Safe as used
Pregnancy
Yes
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-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR