PEG-30 Hydrogenated Castor Oil PCA Isostearate
AKA: Hydrogenated Castor Oil PCA Isostearate Ethoxylate
Plant-Derived
Cleanser
Emulsifier
Plant Oil
Not Clean
Castor oil (Ricinus communis), hydrogenated, ethoxylated, diesters with isooctadecanoic acid and 2-pyrrolidinone-5-carboxylic acid (30 mol EO average molar ratio)
Family
Euphorbiaceae (Spurge family)
Plant Part
Seed
CAS #
61788-85-0
Form
Oil
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emulsifier
Antioxidant Protection
Locks In Moisture
Reduces Inflammation
Mixes Oil & Water
Traditional Use
A modern synthetic emulsifier developed in the mid-20th century by chemically modifying castor oil (which has been used as a traditional emollient for centuries) with polyethylene glycol and isostearic acid to improve solubility and stability in cosmetic formulations.
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
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️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