PEG200MO is a nonionic surfactant produced by the esterification of polyethylene glycol 200 with natural oleic acid. It appears as a light yellow to yellow transparent liquid, with CAS number 9004-96-0, molecular formula C17H33COO(CH2CH2O)nH (n≈4), and an average molecular weight of approximately 400~500. The product has an effective content of ≥99.0%, an HLB value of about 8, making it a lipophilic emulsifier suitable for preparing O/W emulsion systems.
This product exhibits excellent emulsifying ability and wetting permeability. The surface tension of a 1% aqueous solution is only 30~35 mN/m (25°C), and the critical micelle concentration (CMC) ranges from 100 to 500 mg/L. The cloud point range is 40~60°C, the melting point is below -5°C, and it remains liquid at room temperature, facilitating handling and formulation.
| Parameter Item | Specification | Remarks |
|---|---|---|
| Appearance | Light yellow to yellow transparent liquid | Visual inspection |
| Ionic type | Nonionic | — |
| HLB value | ~8 | Lipophilic emulsifier |
| Effective content | ≥99.0% | — |
| Monoester content | ≥95% | — |
| Diester content | ≤3% | — |
| Free alcohol | ≤2% | — |
| Moisture | ≤1.0% | — |
| Molecular weight | 400~500 | Average molecular weight |
| Density (25°C) | 1.11~1.13 g/cm³ | — |
| Kinematic viscosity (25°C) | 100~200 mm²/s | — |
| Refractive index | 1.466~1.468 | — |
| Melting point | <-5°C | Liquid at room temperature |
| Cloud point | 40~60°C | — |
| Flash point (open cup) | >150°C | Not a flammable liquid |
| Acid value | ≤5 mgKOH/g | — |
| Saponification value | 115~125 mgKOH/g | — |
| Hydroxyl value | 80~100 mgKOH/g | — |
| Iodine value | 55~70 gI₂/100g | Indicates degree of unsaturation |
| pH of 1% aqueous solution | 5.0~7.0 | — |
| pH of 5% aqueous solution | 4.5~7.5 | — |
| Surface tension (1% aqueous solution, 25°C) | 30~35 mN/m | — |
| Critical micelle concentration (CMC) | 100~500 mg/L | — |
| Penetration power (canvas sinking time) | ≤60 seconds | Good permeability |
| Foam characteristics | Low foam | — |
| Solubility | Easily soluble in water, ethanol, acetone | — |
| Chemical stability | Hydrolyzable under strong acid or strong base conditions | — |
Based on the product's HLB value of approximately 8, PEG200MO is suitable for use as an O/W emulsifier in formulations such as cosmetic creams/lotions, textile spinning oils, metalworking emulsion cutting fluids, and pesticide emulsions/microemulsions. The recommended dosage depends on the system requirements. Its low foam characteristic makes it particularly suitable for industrial formulations requiring foam suppression, such as metalworking fluids and pesticide preparations.