Polyethylene Glycol 200 Monooleate (PEG200MO / PEG-4 Monooleate) is a highly efficient non-ionic surfactant produced by esterification of polyethylene glycol (PEG-200) with natural oleic acid. Its CAS number is 9004-96-0, and it appears as a light yellow to yellow transparent viscous liquid. Its molecular structure combines hydrophilic polyoxyethylene chains and lipophilic long-chain oleic acid groups, imparting excellent interfacial activity that can effectively reduce oil-water interfacial tension, forming stable and fine O/W emulsion systems.
From a formulation application perspective, the outstanding feature of PEG200MO lies in its non-ionic nature — unaffected by water hardness, maintaining stable performance over a wide pH range (1% aqueous solution pH 5.0~7.0), and it can be well compounded with anionic, cationic, and other non-ionic surfactants. Additionally, this product is a low-foaming surfactant, offering unique advantages in industrial applications requiring low foam. The product has an active content ≥99.0% and monoester content ≥95%, ensuring high purity and formulation efficiency.
Regarding safety, the acute oral toxicity LD₅₀ (rat) of PEG200MO is >5000 mg/kg, belonging to the low-toxicity category; the product is non-flammable (open cup flash point >200℃), not classified as a GHS hazardous chemical, making storage and transportation safe and convenient. Based on natural fatty acid sources, it has low irritation to skin and mucous membranes, suitable for personal care and cosmetic formulation design, meeting the trends of environmental friendliness and mild safety.
| Parameter | Specification |
|---|---|
| Chemical Name | Polyethylene Glycol 200 Monooleate / PEG-4 Monooleate |
| CAS Number | 9004-96-0 |
| Ion Type | Non-ionic |
| Appearance (25℃) | Light yellow to yellow transparent liquid |
| HLB Value | 8 |
| Active Content | ≥99.0% |
| Monoester Content | ≥95% |
| Acid Value | ≤5 mgKOH/g |
| Saponification Value | 115~125 mgKOH/g |
| Hydroxyl Value | 80~100 mgKOH/g |
| Iodine Value | 55~70 gI₂/100g |
| pH Value (1% Aqueous Solution) | 5.0~7.0 |
| Cloud Point | 40~60℃ |
| Surface Tension (1% Aqueous Solution, 25℃) | 30~35 mN/m |
| CMC (Critical Micelle Concentration) | 100~500 mg/L |
| Density (25℃) | 1.11~1.13 g/cm³ |
| Kinematic Viscosity (25℃) | 100~200 mPa·s |
| Refractive Index | 1.466~1.468 |
| Flash Point (Open Cup) | ＞200℃ |
| Water Content | ≤1.0% |
| Solubility | Easily soluble in water, ethanol, acetone |
| Foaming Characteristics | Low foaming |
| Penetration Power | Good (canvas settling time ≤60 seconds) |
Cosmetics and Personal Care Products: Used as an O/W emulsifier in formulations such as creams, lotions, makeup removers, and body washes, with recommended addition amounts of 0.5%~3.0%. With an HLB value of 8, it is suitable for emulsifying medium-polarity oils and can be combined with higher HLB emulsifiers to build stable emulsion systems.
Textile Auxiliaries: In spin finishes and leveling agents, it serves as a lubricating and antistatic component, effectively reducing fiber friction and improving spinnability; its low-foaming property eliminates the need for additional defoamers in high-speed dyeing and finishing processes.
Metalworking Fluids: Used in formulating emulsified cutting fluids and rust preventives. The high monoester content ensures long-term stability of the emulsion. The dosage depends on formulation requirements, typically 3%~15% of the total formulation weight.
Pesticide Formulations: In emulsion in water (EW) and microemulsion (ME), it helps disperse and solubilize active ingredients, improving dilution stability and the spreading and wetting properties of the spray solution, thereby enhancing field efficacy.