PEG400DO (polyethylene glycol 400 dioleate, CAS: 9004-96-0) is a diester-type nonionic surfactant formed by esterification of polyethylene glycol 400 with oleic acid. Its molecular formula can be represented as C17H33COO(CH2CH2O)nOCC17H33 (n≈8). The product appears as a light yellow to amber liquid, with an effective content ≥99%, belonging to high-purity diester products, and is chemically stable under normal storage conditions.
The HLB value of this product is approximately 8.5, making it a lipophilic emulsifier that can be dispersed in water and soluble in organic solvents such as ethanol and acetone. The ester bonds in its molecular structure are prone to hydrolysis under strong alkaline conditions, so formulation design should avoid long-term coexistence with strong alkaline components. The product is a low-foaming surfactant, which can reduce foam interference in industrial applications and is suitable for processes requiring rapid defoaming.
With excellent emulsifying, dispersing, and wetting properties imparted by its diester structure, PEG400DO is widely used in textile oils, metalworking fluids, industrial lubricants, personal care products, and agricultural chemical formulations. The product has low ecotoxicity and is easily biodegradable. During operation, relevant GHS protective requirements should be followed to avoid direct skin and eye contact.
| Parameter name | Specification/value | Remarks |
|---|---|---|
| CAS number | 9004-96-0 | (Source: Guoli Chemical Product Database) |
| Appearance | Light yellow to amber liquid | (Source: Guoli Chemical Product Database) |
| Ionic type | Nonionic | (Source: Guoli Chemical Product Database) |
| Molecular weight | 900~1000 | (Source: Guoli Chemical Product Database) |
| Effective content | ≥99% | (Source: Guoli Chemical Product Database) |
| Diester content | ≥90% | (Source: Guoli Chemical Product Database) |
| Monoester content | ≤5% | (Source: Guoli Chemical Product Database) |
| Free alcohol | ≤2% | (Source: Guoli Chemical Product Database) |
| HLB value | 8.5 | (Source: Guoli Chemical Product Database) |
| Cloud point (1% aqueous solution) | 40~50℃ | (Source: Guoli Chemical Product Database) |
| pH value (1% aqueous solution) | 5.0~7.5 | (Source: Guoli Chemical Product Database) |
| pH value (5% aqueous solution) | 4.5~7.5 | (Source: Guoli Chemical Product Database) |
| Acid value | ≤5.0 mg KOH/g | (Source: Guoli Chemical Product Database) |
| Saponification value | 116~126 mg KOH/g | (Source: Guoli Chemical Product Database) |
| Hydroxyl value | ≤15 mg KOH/g | (Source: Guoli Chemical Product Database) |
| Iodine value | 55~65 g I₂/100g | (Source: Guoli Chemical Product Database) |
| Moisture content | ≤0.5% | (Source: Guoli Chemical Product Database) |
| Density | 1.11~1.13 g/cm³ | (Source: Guoli Chemical Product Database) |
| Kinematic viscosity (25℃) | 100~200 mm²/s | (Source: Guoli Chemical Product Database) |
| Low shear viscosity | Approx. 100~200 mPa·s | (Source: Guoli Chemical Product Database) |
| Refractive index | 1.466~1.468 | (Source: Guoli Chemical Product Database) |
| Flash point | >200℃ | (Source: Guoli Chemical Product Database) |
| Surface tension (0.1%, 25℃) | Approx. 30 mN/m | (Source: Guoli Chemical Product Database) |
| Critical micelle concentration (CMC) | Approx. 1×10⁻⁴ mol/L | (Source: Guoli Chemical Product Database) |
| Solubility | Dispersible in water, soluble in organic solvents such as ethanol and acetone | (Source: Guoli Chemical Product Database) |
| Foaming property | Low foaming | (Source: Guoli Chemical Product Database) |
| Alkali resistance | Not alkali resistant, ester bonds |