Propylene Glycol Isodeceth-4

Propylene Glycol Isodeceth-4 molecular structure
molecular structure · PubChem
AKA: Propylene Glycol Isodecyl Ether
Synthetic
Cleanser
Emulsifier
Not Clean
Poly(oxy-1,2-ethanediyl), .alpha.-isodecyl-.omega.-2-hydroxy-1-methylethyl- (4 mol EO avergae molar ratio)
CAS #
-
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
Brightens Skin
Reduces Inflammation
Wound Healing
Removes Impurities
Mixes Oil & Water
Traditional Use
Synthetic surfactant and emulsifier developed for use in cosmetics formulations. Created to improve product stability and sensory feel in contemporary skincare products.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️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