Merck
All Photos(2)

P6585

Sigma-Aldrich

TWEEN® 20

Low-peroxide; Low-carbonyls

Synonym(s):
Polyethylene glycol sorbitan monolaurate, Polyoxyethylenesorbitan monolaurate
CAS Number:
MDL number:
NACRES:
NA.21

Quality Level

description

non-ionic

form

viscous liquid

mol wt

~1228

contains

BHT as antioxidant

impurities

≤0.5 μmol/g Peroxides
≤1.0 μmol/g Carbonyls
≤3.0% water

refractive index

n20/D 1.468 (lit.)

CMC

0.06 mM (20-25°C)

transition temp

cloud point 76 °C

density

1.095 g/mL at 25 °C (lit.)
1.1 g/cm3 at 25 °C (lit.)

HLB

16.7

storage temp.

2-8°C

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

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General description

Tween®20 is a polyoxyethylene sorbitol ester that belongs to the polysorbate family. It is a nonionic detergent having a molecular weight of 1,225 daltons, assuming 20 ethylene oxide units, 1 sorbitol, and 1 lauric acid as the primary fatty acid. The ethylene oxide subunits are responsible for the hydrophilic nature of the surfactant, while the hydrocarbon chains provide the hydrophobic environment. Sorbitol forms the backbone ring to which the ethylene oxide polymers are attached.

Application

Tween 20 has been used along with PBS to wash plates in ELISA technique.
Non-ionic detergent

Packaging

10, 100 mL in glass bottle

Preparation Note

Purified to remove peroxides and aldehydes

Legal Information

TWEEN is a registered trademark of Croda International PLC

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

527.0 °F - Pensky-Martens closed cup

Flash Point(C)

275 °C - Pensky-Martens closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

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