murphyPEG-20 Hydrogenated Castor Oil Triisostearate
AKA: Castor Oil Derivative
Plant-Derived
Cleanser
Emulsifier
Plant Oil
Not Clean
OriginNative to India. Derived from castor oil extracted from seeds of *Ricinus communis* (Euphorbiaceae family), native to India. Created through hydrogenation and polyethylene glycol esterification of castor oil triglycerides.
Castor oil (Ricinus communis), hydrogenated, ethoxylated, triisooctadecanoate (20 mol EO average molar ratio)
Family
Euphorbiaceae (Spurge family)
Plant Part
Seed
CAS #
188734-82-9
Form
Oil
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Viscosity Controlling
Surfactant Emulsifying
Moisturizing
Strengthens Barrier
Mixes oil and water
Controls product thickness
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.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR's newest survey reports no concentration of use.
CIR · report published 2014
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR