PEG400MO, full name Polyethylene Glycol 400 Monooleate, CAS number 9004-96-0, also known as PEG-8 Monooleate. It is esterified from oleic acid and polyethylene glycol, with a molecular weight of about 600. At room temperature, this product appears as a light yellow to amber transparent oily liquid. With its unique molecular structure, it exhibits efficient emulsifying ability, outstanding wetting and dispersing properties, and excellent chemical resistance, maintaining stable surface activity in acids, bases, and high-hardness water.
As a nonionic surfactant, PEG400MO has wide compatibility and can be compounded with nonionic, anionic, cationic, and amphoteric surfactants. It has good skin affinity and low irritation, making it a safe component with low toxicity and non-irritating properties. In addition, it is easily soluble in water, ethanol, and acetone, with an HLB value of about 11.5. In oil-in-water (O/W) systems, it can effectively reduce interfacial tension, forming stable and fine emulsions.
| Item | Typical Value |
|---|---|
| Appearance | Light yellow to amber transparent liquid |
| Ionic Type | Nonionic |
| HLB Value | 11.5 |
| pH (1% aqueous solution) | 5.0~7.0 |
| Cloud Point (℃) | 50~70 |
| Active Content (%) | ≥99 |
| Density (g/cm³) | 1.11~1.13 |
| Kinematic Viscosity (mm²/s) | About 80~120 |
| Surface Tension (mN/m) | About 32 |
| Critical Micelle Concentration (g/L) | About 0.05 |
| Acid Value (mgKOH/g) | ≤5 |
| Iodine Value (gI₂/100g) | 70~90 |
| Hydroxyl Value (mgKOH/g) | 85~105 |
| Flash Point (℃, closed cup) | >200 |
| Solubility | Easily soluble in water, ethanol, acetone |
Based on its HLB value and excellent emulsifying ability, PEG400MO is particularly suitable for oil-in-water (O/W) emulsion systems:
Basic chemical handling procedures should be followed during operation. The product is non-irritating to the skin, but it is recommended to wear safety goggles to prevent splashes into the eyes. For storage, keep it sealed in a cool, dry, and well-ventilated place at a recommended temperature of 5°C to 40°C. Solidification at low temperatures is a normal physical change; it can be warmed and stirred gently before use. Special care should be taken to avoid contact or co-storage with strong oxidizers (such as high-concentration nitric acid, peroxides).