Laneth-5
AKA “PEG-5 Lanolin, Polyethylene glycol 5 lanolin ether
Synthetic
Ingredient Facts
Laneth-5
AKA: PEG-5 Lanolin, Polyethylene glycol 5 lanolin ether
Synthetic · Cleansing · EWG: 4
Synthetic
Cleanser
Emulsifier
Skin Conditioner
Barrier Lipid
Synthetic
Clean
A gentle cleanser derived from lanolin that helps remove impurities while softening skin and creating a smooth, luxurious texture in formulas.
Effective at 5.04%
CAS #
61791-20-6
Form
Liquid
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Viscosity Controlling
Locks in moisture
Traditional Use
One of the lower ethoxylated synthetic lanolin derivatives developed in the mid-20th century. Used as an emulsifier in cosmetics with more lipophilic character than higher-numbered Laneth variants.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Allergen Warning
⚠️ Lanolin (Wool)
EWG
4
CIR
Safe w/Qualifications
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
0.08%
10.0%
0%14%
Effective Range
CIR reported use: 3-8 | 0.3-4 | 0.1-10 | 0.08-2
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR