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Thermo Scientific™ Polysorbate 40 (Tween™ 40)
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Specifications:
| Application | molecular biology | ||
| Storage Temperature | Ambient | ||
| Product Type | Laboratory Chemical | Forms | Liquid |
| Product Brand | Thermo Fisher Scientific™, thermo Scientific | ||
| Product Grade | Analytical grade | Formula | C₆₂H₁₂₂O₂₆ |
Nonionic Surfactant for Biochemical, Pharmaceutical, and Laboratory Applications
Thermo Scientific™ Polysorbate 40, also known as Tween™ 40, is a high-quality nonionic surfactant widely used in laboratory research, pharmaceutical formulations, biotechnology processes, and diagnostic applications. Chemically described as polyoxyethylene sorbitan monopalmitate, Polysorbate 40 is valued for its excellent emulsifying, solubilizing, and stabilizing properties in aqueous systems.
Supplied as a viscous liquid or paste with controlled physicochemical specifications, this reagent is ideal for applications requiring consistent surfactant performance, including protein stabilization, buffer preparation, and formulation development.
Key Features and Benefits
Versatile Nonionic Surfactant
Polysorbate 40 is commonly used to improve solubility of hydrophobic compounds, stabilize proteins, and prevent nonspecific adsorption in biological assays.
Reliable Quality and Consistency
Each product batch conforms to defined analytical specifications including infrared spectrum identity and controlled acid, hydroxyl, and saponification values.
Broad Application Compatibility
Suitable for use in:
- Biopharmaceutical manufacturing
- Diagnostic reagent formulation
- Cell culture and molecular biology workflows
- Food, cosmetic, and industrial research
Convenient Ambient Storage
Stable at room temperature, simplifying handling and long-term storage.
Synonyms
- Sorbitan monopalmitate, ethoxylated
- Polyoxyethylene sorbitan monopalmitate
- Tween™ 40
Chemical and Physical Properties
| Parameter | Description |
|---|---|
| Product Name | Polysorbate 40 |
| Synonym | Tween™ 40 |
| CAS Number | 9005-66-7 |
| Molecular Formula | C₆₂H₁₂₂O₂₆ |
| MDL Number | MFCD00165345 |
| Appearance | Clear to hazy yellow viscous liquid or paste |
| Density | 1.05 g/cm³ |
| Melting Point | ~0.1 °C |
| Boiling Point | ~100 °C (1013 hPa) |
| Flash Point | >200 °C |
| Storage Temperature | Ambient |
Quality Specifications
| Test | Specification |
|---|---|
| Appearance | Clear to hazy light yellow to dark yellow viscous liquid or paste |
| Infrared Spectrum | Conforms |
| Acid Value | ≤ 3 mg KOH/g |
| Hydroxyl Value | 89 – 105 mg KOH/g |
| Saponification Value | 41 – 55 mg KOH/g |
Applications
Thermo Scientific™ Polysorbate 40 is widely used in:
- Emulsification of oils and hydrophobic compounds
- Stabilization of proteins and enzymes in buffers
- Surfactant additive in ELISA and immunoassays
- Pharmaceutical excipient in injectable formulations
- Prevention of surface adsorption in labware and tubing
Ordering Information
| Product Code | Pack Size | Packaging |
|---|---|---|
| 334140250 | 25 mL | Glass bottle |
| 334142500 | 250 mL | Glass bottle |
| 334140010 | 1 L | Glass bottle |
| 334140025 | 2.5 L | Glass bottle |
Thermo Scientific™ Polysorbate 40 (Tween™ 40) is a dependable, high-purity nonionic surfactant designed for demanding laboratory and industrial applications. With excellent emulsifying and stabilizing performance, controlled quality specifications, and flexible packaging options, it is an essential reagent for biopharmaceutical research, diagnostics, and formulation workflows requiring consistent surfactant functionality.
- Pack Size: 12 mL Glass bottle, 1L Glass bottle, 2.5L Glass bottle, 250 mL