Oleth-8
AKA “Oleyl Ethoxylate 8, Oleth 8, Polyethylene Glycol Monooleyl Ether
Synthetic
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Ingredient Facts
Oleth-8
AKA: Oleyl Ethoxylate 8, Oleth 8, Polyethylene Glycol Monooleyl Ether
Synthetic · Surfactant - Emulsifying | Surfactant - Cleansing · EWG: 3
Plant-Derived
Cleanser
Emulsifier
Synthetic
Not Clean
A gentle plant-derived cleanser that helps blend water and oils together, creating a smooth, stable texture in formulas.
CAS #
9004-98-2
Form
Liquid
Plant-Derived
Synthetic. Derived from oleic acid and ethylene oxide, both petroleum-derived or plant-oil-derived chemical compounds. Synthesized through ethoxylation, where ethylene oxide chains are added to oleic acid via catalytic reaction.
Function
Surfactant - Emulsifying | Surfactant - Cleansing
Benefits
Emulsifier
Mixes Oil & Water
Traditional Use
Developed in the mid-20th century as a synthetic polyethylene glycol ether derivative of oleic acid. Used in cosmetics as a surfactant and emulsifier with no significant traditional use history.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score3
CIR Safety Findings
medical-approval, all-shades-safe, Not a Sensitizer
Concentration Guide
Industry reports use up to 18.0% across all product types. Source: CIR Safety Assessment (CIR Seq 581).
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR