Sigma-Aldrich Tween(R) 20 For Synthesis

Vapor Pressure

<1.4 hPa ( 20 °C)

Quality Level

200

Form

liquid

Potency

38900 mg/kg LD₅₀, oral (Rat)

Mol Wt

~1228

Refractive Index

n20/D 1.468 (lit.)

pH

6-8 (20 °C, 50 g/L in H₂O)

Transition Temp

flash point 275 °C

Density

1.095 g/mL at 25 °C (lit.)

Storage Temp.

2-30°C

General Description

Tween^®-20 is a polysorbate-based non-ionic surfactant. It is made up of three chemical units:

• aliphatic ester chains that hinder biomolecules from nonspecific interactions
• aliphatic chain that can be non-covalently adsorbed on a hydrophobic surface
• hydrophilic terminal hydroxyl groups, which can be chemically modified for potential applications.

Application

Tween^®-20 can be used as a structure-directing agent in the preparation of mesoporous oxide films because of its ability to promote textural properties of the films such as controllable crystallinity, film morphology, tailor-designed pore structure, high BET surface area, and controlled film thickness. It is also used in the synthesis of AuNPs/TWEEN/GO composites, where Tween^®-20 acts as a reducing and immobilizing agent for AuNPs (Au nanoparticles) as well as a stabilizing agent for GO (graphene oxide).
Tween^®-20 can also be used as an emulsifying, solubilizing, and wetting agent in a variety of liquid formulations.[5][6]Non-ionic detergent

Analysis Note

Density (d 20 °C/ 4 °C): 1.095 - 1.105
Hydroxyl value: 96 - 108
Saponification value: 40 - 50
Identity (IR): passes test
Due to its specific melting range the product may be solid, liquid, a solidified melt or a supercooled melt.TWEEN is a registered trademark of Croda International PLC