Tween T-80 (chemical name: Polyoxyethylene (20) sorbitan monooleate, CAS number: 9005-65-6) is a light yellow to amber liquid nonionic surfactant provided by Guoli Chemical. Its HLB value is as high as 15, making it a hydrophilic emulsifier particularly suitable for preparing oil-in-water (O/W) emulsions. As a versatile surfactant, it can significantly reduce the oil-water interfacial tension, form a stable and fine emulsion system, and has excellent solubilization ability for poorly soluble substances. It is an indispensable functional additive in formulation development.
This product has four core performance advantages: First, efficient emulsification and solubilization, capable of stabilizing emulsions and solubilizing hydrophobic components; Second, excellent dispersion and wetting, allowing rapid adsorption at solid/liquid interfaces and preventing powder agglomeration; Third, broad-spectrum chemical compatibility, remaining stable under acidic, alkaline, and hard water conditions, and compatible with both ionic and nonionic additives; Fourth, mild low toxicity, meeting green chemistry application requirements in multiple fields such as pharmaceuticals and food, with low toxicity to aquatic organisms and biodegradability.
It is worth noting that Tween T-80 has relatively poor penetrating power and alkali resistance. Its foaming tendency is low foam type, and it is hygroscopic. It may undergo hydrolysis under strong acid or strong base conditions. Therefore, these characteristics should be fully considered in formulation design to maximize its emulsification and solubilization functions.
| Parameter Item | Technical Indicator |
|---|---|
| Product Name | Tween T-80 (Polysorbate 80) |
| CAS Number | 9005-65-6 |
| Appearance | Light yellow to amber liquid |
| Ion Type | Nonionic |
| HLB Value | 15 |
| Active Content | ≥97% |
| pH Value (1% Aqueous Solution) | 5.0-7.0 |
| Cloud Point (1% Aqueous Solution) | Approx. 93°C |
| Density | 1.06~1.10 g/cm³ |
| Melting Point | Liquid (at room temperature) |
| Flash Point | >149°C |
| Surface Tension (0.1% Aqueous Solution) | 42.5 mN/m |
| Critical Micelle Concentration (CMC) | 1.3×10⁻⁵ mol/L |
| Hydroxyl Value | 65~80 mgKOH/g |
| Saponification Value | 45~55 mgKOH/g |
| Acid Value | ≤2.0 mgKOH/g |
| Moisture Content | ≤3.0% |
| Viscosity (25°C) | Approx. 600 mPa·s |
| Solubility | Easily soluble in water, benzene, and organic solvents |
| Foam Characteristic | Low foam |
| Heavy Metal Content | ≤10 ppm |
| Arsenic Content | ≤2 ppm |
| Packaging Specification | 50kg/200kg plastic drum |
With its high HLB value and excellent solubilization ability, Tween T-80 plays a key role in multiple industries: