PEG-18 Castor Oil Dioleate
AKA “PEG-18 castor oil dioleate”
Carrier Oil
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Ingredient Facts
Peg-18 castor oil dioleate
Carrier Oil · Emulsifying · EWG: 4
Plant-Derived
Cleanser
Emulsifier
Plant Oil
Not Clean
Castor oil (Ricinus communis), ethoxylated, diesters with 9-(Z)-octadecenoic acid (18 mol EO average molar ratio)
Family
Euphorbiaceae (Spurge family)
Plant Part
Seed
Form
Oil
See origin →
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 synthetic derivative combining polyethylene glycol with castor oil, traditionally used in folk and Ayurvedic medicine for skin conditioning. The modified version was developed in the 20th century to improve water solubility 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 a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR