The core component of PEG600DO (Polyethylene Glycol 600 Dioleate) is Polyethylene Glycol 600 Dioleate, with the molecular formula C36H66O4(C2H4O)n (where n≈13) and an average molecular weight of approximately 1100. This product is formed by the esterification reaction of the hydroxyl groups at both ends of the Polyethylene Glycol 600 (PEG-600) molecular chain with two molecules of oleic acid (C18 unsaturated fatty acid), belonging to nonionic gemini surfactants.
The main structural composition of the product is: a hydrophilic polyoxyethylene chain segment (containing approximately 13 ethylene oxide units on average) serving as the backbone, with a lipophilic oleic acid group (C17H33COO-) attached at each end. This A-B-A type block molecular structure endows it with unique amphiphilic properties—it can form stable molecular oriented arrangements at the oil/water interface and can be well compounded with other anionic, cationic, and nonionic surfactant systems.
According to actual data from the Guoli Chemical database, besides the main component diester, the product may contain small amounts of by-products: monoester content ≤5%, free alcohol ≤3%, moisture ≤1.0%, acid value of finished product ≤2 mgKOH/g, saponification value in the range of 90~110 mgKOH/g. The product appears as a light yellow to yellow liquid, CAS number 9004-96-0.
| Parameter Item | Indicator |
|---|---|
| Diester Content | ≥95% |
| Monoester Content | ≤5% |
| Effective Active Substance Content | ≥99% |
| Free Alcohol | ≤3% |
| Acid Value | ≤2 mgKOH/g |
| Saponification Value | 90~110 mgKOH/g |
| Hydroxyl Value | ≤10 mgKOH/g |
| Iodine Value | 40~60 gI₂/100g |
| Moisture | ≤1.0% |
| HLB Value | 10~11 |
| Molecular Weight | Approximately 1100 |
| Molecular Formula | C36H66O4(C2H4O)n, n≈13 |
| Appearance | Light yellow to yellow liquid |
Due to its high diester content and moderate HLB value in the range of 10~11, this product can balance emulsification efficiency and emulsion stability in emulsified formulations. It is recommended to be added at 2%~8% in cosmetic creams/lotions, diluted to 5%~15% working solution in metalworking cutting fluids, and used as an emulsifier in pesticide emulsifiable concentrates at 5%~15% of the total formulation. The specific dosage should be optimized through experiments based on the formulation system and target performance.
Since this product is a nonionic surfactant, its emulsification performance is less affected by water hardness and pH. It is dispersible in water and soluble in organic solvents such as ethanol and acetone, offering strong formulation adaptability.