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PEG-45 Stearate
AKA “Ethylene glycol monostearate, Glycol stearate, 111-60-4, 2-Hydroxyethyl octadecanoate, Monthybase, Monthyle, Parastarin, Ivorit, Sedetol, Glycol monostearate”
Surfactant
Ingredient Facts
Peg-45 stearate
AKA: Ethylene glycol monostearate, Glycol stearate, 111-60-4, 2-Hydroxyethyl octadecanoate, Monthybase, Monthyle, Parastarin, Ivorit, Sedetol, Glycol monostearate
Surfactant · Cleansing · EWG: 4
Plant-Derived
Cleanser
Emulsifier
Not Clean
Poly(oxy-1,2-ethanediyl), .alpha.-(1-oxooctadecyl)-.omega.-hydroxy- (45 mol EO average molar ratio)
Solubility POLYETHYLENE GLYCOL ESTERS AND ETHERS INCR THE WATER SOLUBILITY OF TYROTHRICIN.
Formula
C20H40O3
Mol. Weight
328.50
CAS #
9004-99-3
Form
Liquid
See origin →
Functions
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.
Surfactant Cleansing
Surfactant Emulsifying
Moisturizing
Strengthens Barrier
Lifts away dirt and oil
Mixes oil and water
Traditional Use
A synthetic emulsifier developed in the mid-20th century combining polyethylene glycol with stearic acid (naturally derived from animal or vegetable fats). Created to improve water solubility and emulsifying stability compared to traditional stearate-based emulsifiers.
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 Status
USA✔ permitted
CANADA✔ permitted
Regulatory Agencies
Final Report on the Safety Assessment of Glycol Stearate, Glycol Stearate SE, and Glycol Distearate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Final Report on the Safety Assessment of PEG-25 Propylene Glycol Stearate, PEG-75 Propylene Glycol, PEG-120 Propylene Glycol Stearate, PEG-10 Propylene Glycol, PEG-8 Propylene Glycol Cocoate, and PEG-
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Final Report on the Safety Assessment of Propylene Glycol Stearate and Propylene Glycol Stearate Self-Emulsifying
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Glycol Stearate and Glycol Stearate SE
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Glycol Stearate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Glycol Stearate SE
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
PEG-120 Propylene Glycol Stearate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
PEG-25 Propylene Glycol Stearate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
PEG-45 Stearate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
PEG-75 Propylene Glycol Stearate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Propylene Glycol Stearate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Propylene Glycol Stearate SE
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Glycol Stearate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
PEG-25 Propylene Glycol Stearate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Propylene Glycol Stearate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Propylene Glycol Stearate SE
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Final report on the safety assessment of PEG-25 propylene glycol stearate, PEG-75 propylene glycol stearate, PEG-120 propylene glycol stearate, PEG-10
Johnson W Jr, Cosmetic Ingredient Review Expert Panel
International journal of toxicology, 2001
→
Glycol Stearate and Glycol Stearate SE.
Tucker R, Bergfeld WF, Belsito DV, Cohen DE, Klaassen CD et al.
International journal of toxicology, 2023
→
Glycol Stearate and Glycol Stearate SE.
Tucker R, Bergfeld WF, Belsito DV, Cohen DE, Klaassen CD et al.
International journal of toxicology, 2023
→
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR