Polyoxyethylene Sorbitan Fatty Acid Esters CAS#9005-65-6
Polyoxyethylene sorbitan fatty acid esters, commonly known as "Tween," are available in various forms, including yellow to amber viscous liquids, pastes, or waxy solids. For example, Tween 20 is a liquid, Tween 60 is a paste, and Tween 85 is a viscous liquid, reflecting differences in fatty acid chain length. They have little to no odor, or only a slight characteristic smell. These esters are readily soluble in polar solvents such as water, ethanol, and ethylene glycol, but show poor solubility in non-polar solvents like mineral oil and vegetable oil.
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Tween 80 Chemical Properties
| Melting point | -25 °C |
| Boiling point | >100°C |
| density | 1.08 g/mL at 20 °C |
| vapor pressure | <1 mm Hg ( 20 °C) |
| refractive index | n20/D 1.473 |
| FEMA | 2917 | POLYSORBATE 80 |
| Fp | >230 °F |
| storage temp. | -20°C |
| solubility | DMSO (Soluble), Methanol (Slightly) |
| form | viscous liquid |
| color | Amber |
| Specific Gravity | 1.080 (25/4℃) |
| PH Range | 6 |
| Odor | mild alcoholic |
| PH | 5-7 (50g/l, H2O, 20℃) |
| Odor Type | alcoholic |
| biological source | synthetic |
| Water Solubility | 5-10 g/100 mL at 23 ºC |
| Merck | 147582 |
| Hydrophilic-Lipophilic Balance (HLB) | 10 |
| LogP | 4.392 (est) |
| EPA Substance Registry System | Polysorbate 80 (9005-65-6) |
![Polyoxyethylene Sorbitan Fatty Acid Esters CAS#9005-65-6]( "Polyoxyethylene Sorbitan Fatty Acid Esters CAS#9005-65-6")
Product Usage
Polyoxyethylene sorbitan fatty acid esters (trade name "Tween"), as hydrophilic nonionic surfactants, offer emulsifying, solubilizing, dispersing, and stabilizing functions. In the food industry, they help optimize taste and extend shelf life. In the pharmaceutical sector, they ensure formulation stability and improve drug absorption. In industrial applications, they enhance processing performance and the quality of finished products.
![Polyoxyethylene Sorbitan Fatty Acid Esters CAS#9005-65-6]( "Polyoxyethylene Sorbitan Fatty Acid Esters CAS#9005-65-6")
