8.22184

TWEEN^® 20

for synthesis

• Synonym(s): Montanox 20, Polyoxyethylene (20) sorbitan monolaurate, Polysorbate 20, Polyethylene glycol sorbitan monolaurate, Polyoxyethylenesorbitan monolaurate
• CAS Number: 9005-64-5
• MDL number: MFCD00165986
• UNSPSC Code: 12352104
• EC Index Number: 500-018-3
• NACRES: NA.22

Properties

• 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
• SMILES string: CCCCCCCCCCCC(=O)OCCOCC(C1C(C(CO1)OCCO)OCCO)OCCO
• InChI: 1S/C26H50O10/c1-2-3-4-5-6-7-8-9-10-11-24(30)34-19-18-31-20-22(32-15-12-27)26-25(35-17-14-29)23(21-36-26)33-16-13-28/h22-23,25-29H,2-21H2,1H3
• InChI key: HMFKFHLTUCJZJO-UHFFFAOYSA-N

Description

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.

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.

Legal Information

TWEEN is a registered trademark of Croda International PLC

Safety Information

• Storage Class: 10 - Combustible liquids
• wgk_germany: WGK 1
• flash_point_f: 527.0 °F - Pensky-Martens closed cup
• flash_point_c: 275 °C - Pensky-Martens closed cup