PEG 400 MONOOLEATE

PEG 400 monooleate is a nonionic surfactant formed from polyethylene glycol and oleic acid, combining water-attracting and oil-attracting components that enable it to support emulsification, wetting, dispersion, and lubrication in various formulations.
PEG 400 monooleate typically appears as a pale yellow to amber liquid and has an HLB value of approximately 11–12, making it suitable for oil-in-water emulsions that require oily ingredients to be distributed throughout an aqueous phase.
PEG 400 monooleate serves as a multifunctional formulation ingredient in cosmetics, textile processing auxiliaries, industrial lubricants, and metalworking fluids, where its emulsifying, dispersing, and lubricating properties help meet different processing and product performance requirements.

CAS number: 9004-96-0
EC Number: 500-038-2
Molecular Formula: (C2H4O)nC18H34O2

Synonyms: Oleic acid PEG-400 ester, Polyethylene glycol monooleate, PEG oleate, PEG-8 oleate, Ethoxylated oleyl ester (PEG-based), Nonionic PEG fatty acid ester, Oleyl poly(ethylene glycol) ester, Poly(oxy-1,2-ethanediyl), .alpha.-[(9Z)-1-oxo-9-octadecen-1-yl]-. omega.-hydroxy-, PEG-8 OLEATE, PEG-9 OLEATE, PEG-10 OLEATE, PEG-11 OLEATE, PEG-12 OLEATE

PEG 400 monooleate is a nonionic surfactant formed by esterifying oleic acid with polyethylene glycol having an average molecular weight of approximately 400.
PEG 400 monooleate combines a hydrophilic PEG chain with a lipophilic fatty acid group, enabling it to support oil-in-water emulsification, wetting, and dispersion.

PEG 400 monooleate's emulsifying properties and lubricity make it useful in cosmetic formulations, textile auxiliaries, lubricants, and metalworking fluids.
PEG 400 monooleate helps incorporate oily components into aqueous systems and supports uniform ingredient distribution within formulations.
PEG 400 monooleate is commonly identified as PEG-8 Oleate in cosmetic ingredient nomenclature.

PEG 400 monooleate is a nonionic surfactant of the fatty acid ethoxylate type. 
PEG 400 monooleate is good general purpose emulsifiers for vegetable oils and their derivatives as well as mineral oils. 

PEG 400 monooleate is a nonionic surfactant and emulsifying agent obtained by the partial esterification of polyethylene glycol with an average molecular weight of approximately 400 (PEG 400) and oleic acid, a long-chain unsaturated fatty acid.
The resulting molecule contains a hydrophilic polyethylene glycol segment and a lipophilic oleate chain, giving it amphiphilic characteristics that enable effective interaction between aqueous and oily phases.
PEG 400 monooleate is typically supplied as a clear to pale yellow, viscous liquid with low volatility and good handling properties.

PEG 400 monooleate is extensively used in pharmaceutical and cosmetic formulations, where it supports drug solubilization, enhances bioavailability of poorly water-soluble actives, and improves texture and sensory properties of creams, lotions, and topical preparations.
In personal care products, PEG 400 monooleate contributes to smooth application, spreadability, and mildness.

PEG 400 monooleate is a nonionic surfactant produced by esterifying oleic acid with polyethylene glycol having an average molecular weight of approximately 400.
PEG 400 monooleate's structure combines a water-attracting polyethylene glycol chain with an oil-attracting oleate group, allowing it to act at the interface between aqueous and oily phases.

This balance gives PEG 400 monooleate useful emulsifying, wetting, dispersing, and lubricating properties, particularly in oil-in-water formulations.
PEG 400 monooleate helps incorporate oily ingredients into aqueous systems and promotes more uniform distribution of formulation components.
PEG 400 monooleate is used in cosmetic products, textile processing auxiliaries, industrial lubricants, and metalworking fluids, where it can support emulsification and lubrication.

Applications of PEG 400 Monooleate:
PEG 400 monooleate is a nonionic surfactant produced by esterifying oleic acid with polyethylene glycol having an average molecular weight of approximately 400.
PEG 400 monooleate's structure combines a water-attracting polyethylene glycol chain with an oil-attracting oleate group, allowing it to act at the interface between aqueous and oily phases.

This balance gives PEG 400 monooleate useful emulsifying, wetting, dispersing, and lubricating properties, particularly in oil-in-water formulations.
PEG 400 monooleate helps incorporate oily ingredients into aqueous systems and promotes more uniform distribution of formulation components.

PEG 400 monooleate is used in cosmetic products, textile processing auxiliaries, industrial lubricants, and metalworking fluids, where it can support emulsification and lubrication.
In cosmetic ingredient nomenclature, PEG 400 monooleate is commonly identified as PEG-8 Oleate.

Cosmetic Formulations:
PEG 400 monooleate is used as an emulsifier and dispersing agent in creams, lotions, and bath oils.
PEG 400 monooleate helps distribute oily ingredients within the formulation.

Textile Processing:
PEG 400 monooleate is used in textile auxiliaries for its wetting, emulsifying, and lubricating properties.
PEG 400 monooleate supports the distribution of processing ingredients and provides lubrication during treatment.

Metalworking Fluids:
PEG 400 monooleate is incorporated into metalworking fluids as an emulsifying and lubricating ingredient.
PEG 400 monooleate helps disperse oil components in aqueous systems.

Industrial Lubricants:
PEG 400 monooleate is used in lubricant formulations where both lubricity and emulsification are required.
PEG 400 monooleate can help incorporate components into a uniformly dispersed system.

Wetting and Dispersing Formulations:
PEG 400 monooleate serves as a nonionic surfactant in formulations requiring improved wetting and ingredient dispersion.
PEG 400 monooleate supports uniform distribution of components during mixing and application.

Benefits of PEG 400 Monooleate:
PEG 400 monooleate offers emulsifying, wetting, dispersing, and lubricating benefits in cosmetic and industrial formulations.
PEG 400 monooleate's oil-in-water emulsifying properties help distribute oily ingredients within aqueous systems, while its wetting and dispersing functions support more uniform ingredient distribution.

PEG 400 monooleate's lubricity makes it useful in metalworking fluids, industrial lubricants, and textile processing auxiliaries.
By combining several functions in one nonionic surfactant, PEG 400 monooleate gives formulators flexibility when developing products that require both emulsification and lubrication.

Stability and Reactivity of PEG 400 Monooleate:

Chemical stability:
PEG 400 monooleate is stable under normal conditions.

Reactivity:
No dangerous reactions are known during normal use.

Incompatible materials:
Avoid strong oxidizing agents.

Handling and Storage of PEG 400 Monooleate:

Safe handling:
Avoid eye contact and provide adequate ventilation.

Storage conditions:
Keep containers tightly closed, away from incompatible materials.

First Aid Measures of PEG 400 Monooleate:

Inhalation:
Move to fresh air.

Skin contact:
Wash with soap and water.

Eye contact:
Rinse for at least 15 minutes; remove contact lenses if easily possible.

Ingestion:
Rinse mouth.

Medical attention:
Seek medical advice if symptoms develop or persist.

Firefighting Measures of PEG 400 Monooleate:

Extinguishing media:
Use water fog, foam, dry powder, or carbon dioxide; avoid water jets.

Special hazards:
Fire may generate hazardous gases.

Firefighter protection:
Wear self-contained breathing apparatus and full protective clothing.

Accidental Release Measures of PEG 400 Monooleate:

Personal precautions:
Keep unnecessary personnel away and wear protective equipment.

Environmental precautions:
Prevent entry into drains and waterways.

Cleanup:
Absorb with sand or vermiculite and collect in suitable containers.

Exposure Controls / Personal Protective Equipment of PEG 400 Monooleate:

Engineering controls:
Provide ventilation and an eyewash station.

Personal protection:
Wear goggles, chemical-resistant gloves, and protective clothing.

Respiratory protection:
Use suitable respiratory equipment if ventilation is insufficient.

Identifiers of PEG 400 Monooleate:
Product name: PEG 400 monooleate.
Chemical name: Polyethylene Glycol 400 Monooleate.
CAS number: 9004-96-0.
INCI name: PEG-8 Oleate.
UNII: MNB8P1NH2O.
Molacular Formula: (C2H4O)nC18H34O2

INCI name: PEG-8 Oleate
CAS number: 9004-96-0
EC Number: 500-038-2
Chemical family: Nonionic surfactant, fatty acid ester of polyethylene glycol
Average molecular weight: ~650–700 g/mol
Physical form: Liquid
Appearance: Clear to pale yellow, viscous liquid
Odor: Mild, characteristic fatty odor

Properties of PEG 400 Monooleate:
Physical state: Liquid
Appearance: Clear to pale yellow, viscous liquid
Odor: Mild, characteristic fatty odor
Chemical nature: Nonionic surfactant; polyethylene glycol fatty acid ester
Average molecular weight: Approximately 650–700 g/mol
Water solubility: Dispersible to partially soluble in water
Solubility in organic solvents: Soluble in many organic solvents and oils
pH: Neutral to slightly acidic
Density: Approximately 0.95–1.05 g/cm³ (at 20 °C)
Viscosity: Moderate to high
HLB value: Medium to high
Flash point: >100 °C

Boiling point: >260 °C(lit.)
Density: 1.034 g/mL at 25 °C
Refractive index: n20/D 1.468
Fp: 113 °C
Storage temp.: Amber Vial, Refrigerator
Solubility: toluene, ethanol and acetone: soluble (dispersible in water)
Form: Oil
Color: Colourless to Light Beige
Water Solubility: toluene, ethanol and acetone: soluble (dispersible in water)
Hydrophilic-Lipophilic Balance (HLB): 15.1
Stability: Light Sensitive
Cosmetics Ingredients Functions    SURFACTANT - EMULSIFYING
SURFACTANT - CLEANSING
InChI: InChI=1S/C20H38O3/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-20(22)23-19-18-21/h9-10,21H,2-8,11-19H2,1H3
InChIKey: MUHFRORXWCGZGE-UHFFFAOYSA-N
LogP: 7.185 (est)
EPA Substance Registry System: PEG 400 monooleate (9004-96-0)