PEG-40 Castor Oil
AKA “Polyethylene Glycol 40 Castor Oil, PEG-40 CO”
Essential Oil
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Ingredient Facts
Peg-40 castor oil
AKA: Polyethylene Glycol 40 Castor Oil, PEG-40 CO
Essential Oil · Surfactant - Cleansing | Surfactant - Emulsifying · EWG: 4
Plant-Derived
Cleanser
Emulsifier
Plant Oil
Essential Oil
Not Clean
A gentle plant-derived cleanser from castor seeds that helps remove impurities and blend ingredients together for a smooth, unified product texture.
Family
Euphorbiaceae (Spurge family)
Plant Part
Seed
CAS #
61791-12-6
Form
Oil
Plant-Derived
Botanical. Native to India. Derived from castor oil extracted from seeds of Ricinus communis, a plant native to tropical regions including India. Produced through polyethylene glycol (PEG) ethoxylation of castor oil to create a polysorbate-type emulsifier.
Plant Source
Euphorbiaceae (Spurge family)
Plant Part
Seed
Function
Surfactant - Cleansing | Surfactant - Emulsifying
Benefits
Cleansing Surfactant
Emulsifier
Antioxidant Protection
Wound Healing
Removes Impurities
Mixes Oil & Water
Traditional Use
Synthetic derivative combining polyethylene glycol with castor oil (traditionally used in folk medicine and as a laxative since ancient times). Developed in the 20th century as a solubilizer and emulsifier.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe, Not a Sensitizer
Regulatory Agencies
Verified Feb 2026
Data: CosIng · EWG · CIR