PEG600DO (CAS No.: 9004-96-0) is a nonionic surfactant with a molecular formula of C36H66O4(C2H4O)n (n≈13) and a molecular weight of approximately 1100. Its molecular structure consists of a hydrophilic polyethylene glycol (PEG-600) chain segment and two lipophilic oleic acid groups. This diester structure endows the product with excellent emulsifying, dispersing, and wetting capabilities. The product appears as a light yellow to yellow liquid, with a freezing point below 0°C, remaining liquid at room temperature for easy handling and formulation.
In terms of emulsification performance, the diester content is ≥95%, monoester content ≤5%, free alcohol content ≤3%, and active ingredient content ≥99%, indicating high purity. The HLB value (hydrophilic-lipophilic balance) is 10~11, falling within the O/W (oil-in-water) emulsifier category. It is dispersible in water and soluble in organic solvents such as ethanol and acetone, showing good compatibility with anionic, cationic, and nonionic systems. The cloud point range is 55~65°C, and its low-foaming property offers significant advantages in industrial cleaning applications.
From a safety and stability perspective, the product has a flash point >200°C (closed cup), making it non-flammable; the acute oral toxicity LD50 is >5000 mg/kg, classifying it as practically non-toxic; it is chemically stable and maintains activity in acid, alkali, and hard water media, but its alkali resistance is rated as "poor", requiring careful evaluation in strongly alkaline formulations. This product is classified as a non-hazardous substance, with relatively lenient storage and transportation conditions, recommended storage temperature being 5~40°C.
| Parameter Item | Value | Remarks |
|---|---|---|
| Appearance | Light yellow to yellow liquid | Visual inspection |
| CAS No. | 9004-96-0 | — |
| Molecular Formula | C36H66O4(C2H4O)n, n≈13 | — |
| Molecular Weight | Approx. 1100 | — |
| Ionic Type | Nonionic | — |
| HLB Value | 10~11 | O/W emulsifier |
| Cloud Point | 55~65 °C | 1% aqueous solution |
| Active Content | ≥99% | — |
| pH (1% aqueous solution) | 5.0~7.0 | 25°C |
| pH (5% aqueous solution) | 4.5~7.5 | 25°C |
| Density | 1.11~1.13 g/cm³ | 20°C |
| Kinematic Viscosity | 150~250 mm²/s | 40°C |
| Refractive Index | 1.466~1.468 | 20°C |
| Flash Point | >200 °C | Closed cup method |
| Freezing Point | <0 °C | — |
| Surface Tension | 30~35 mN/m | 25°C, near critical micelle concentration |
| Critical Micelle Concentration (CMC) | 0.01~0.1% (w/v) | 25°C |
| Acid Value | ≤2 mg KOH/g | — |
| Saponification Value | 90~110 mg KOH/g | — |
| Hydroxyl Value | ≤10 mg KOH/g | — |
| Iodine Value | 40~60 g I₂/100g | — |
| Moisture Content | ≤1.0% | — |
| Diester Content | ≥95% | — |
| Monoester Content | ≤5% | — |
| Free Alcohol | ≤3% | — |
| Solubility | Dispersible in water, soluble in ethanol and acetone | — |
| Foaming Characteristics | Low foaming | — |
| Chemical Stability | Stable | In acid, alkali, and hard water media |
| Alkali Resistance | Poor | Evaluate in strongly alkaline environments |
| Hygroscopicity | Slightly hygroscopic | — |