Lauric Acid Polyoxyethylene Ether LAE-4 (CAS No.: 9004-81-3) is a high-quality nonionic surfactant produced by Guoli Chemical, with the chemical name Polyoxyethylene (4) Laurate (PEG-4 Laurate). The combination of lauric acid lipophilic groups and 4 EO hydrophilic units in its molecular structure gives the product an oil-water balance with an HLB value of approximately 9.0, making it particularly outstanding in water-in-oil (W/O) emulsification systems.
The active content of this product is ≥99.0%, the monoester content is ≥98.0%, and the free alcohol content is ≤1.0%, indicating high purity and low by-products. Its acid value is ≤5.0 mgKOH/g, saponification value is 145~165 mgKOH/g, and hydroxyl value is 140~160 mgKOH/g, providing precise feed calculation basis for formulation engineers. The product has a melting point below -5℃ and a flash point above 150℃, ensuring good safety under normal operating temperatures.
In terms of emulsification performance, the surface tension of this product is approximately 30 mN/m, and the critical micelle concentration (CMC) is approximately 30 mg/L, allowing it to rapidly reduce oil/water interfacial tension and form stable, fine emulsions. Its cloud point is approximately 32℃ (1% aqueous solution), which means it is a low cloud point product, and attention should be paid to the effect of temperature on water solubility during use. The foam characteristics are low foaming, making it particularly suitable for applications requiring foam suppression or easy rinsing.
| Parameter Item | Specification Value | Remarks |
|---|---|---|
| Chemical Name | Polyoxyethylene (4) Laurate (PEG-4 Laurate) | — |
| CAS No. | 9004-81-3 | — |
| Molecular Formula | CH₃(CH₂)₁₀COO(CH₂CH₂O)nH, n≈4 | — |
| Molecular Weight | Approximately 376 | — |
| Ionic Type | Nonionic | — |
| Appearance (25℃) | Colorless to pale yellow transparent liquid | — |
| Active Content (%) | ≥99.0 | Solid content |
| Monoester Content (%) | ≥98.0 | Main component purity |
| Diester Content (%) | ≤1.0 | By-product |
| Free Alcohol (%) | ≤1.0 | — |
| Water Content (%) | ≤1.0 | — |
| pH Value (1% Aqueous Solution) | 5.0~7.0 | — |
| pH Value (5% Aqueous Solution) | 5.0~7.0 | — |
| HLB Value | 9.0 | Hydrophilic-lipophilic balance |
| Cloud Point (℃) | Approximately 32 (1% Aqueous Solution) | — |
| Acid Value (mgKOH/g) | ≤5.0 | — |
| Saponification Value (mgKOH/g) | 145~165 | — |
| Hydroxyl Value (mgKOH/g) | 140~160 | — |
| Iodine Value (gI₂/100g) | ≤1.0 | Low unsaturation |
| Unsaturation (%) | ≤0.1 | — |
| Density (g/cm³) | 0.97 | — |
| Kinematic Viscosity (mm²/s) | Approximately 35 | — |
| Refractive Index | 1.456 | — |
| Melting Point (℃) | <-5 | Does not solidify at low temperature |
| Flash Point (℃) | >150 | High safety |
| Surface Tension (mN/m) | Approximately 30 | — |
| Critical Micelle Concentration CMC (mg/L) | Approximately 30 | — |
| Solubility | Easily soluble in oil, dispersible in water | — |
| Foam Characteristics | Low foaming | — |
| Hygroscopicity | Low | — |
| Chemical | — | — |