PPG-3-Isodeceth-1
AKA “Polypropylene Glycol 3 Isodeceth-1
Emollient
Ingredient Facts
PPG-3-Isodeceth-1
AKA: Polypropylene Glycol 3 Isodeceth-1
Emollient · Emollient · EWG: 4
Synthetic
Emollient
Skin Conditioner
Not Clean
Isodecanol, ethoxylated, propoxylated (1 mol EO, 3 mol PO average molar ratio)
CAS #
155683-77-5
Form
Liquid
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Locks In Moisture
Traditional Use
Synthetic emulsifier developed in the mid-20th century as part of the polypropylene glycol family. Created to improve the mixing of oil and water-based ingredients in cosmetic formulations.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR