P2287

TWEEN^® 20

viscous liquid, suitable for cell culture

• Sinónimos: Monolaurato de sorbitán polietilenglicol, Monolaurato de sorbitán polioxietileno
• Número de CAS: 9005-64-5
• Número MDL: MFCD00165986
• Código UNSPSC: 12161900
• NACRES: NA.21

Propiedades

• descripción: non-ionic
• formulario: viscous liquid
• mol peso: ~1228
• composición: lauric acid, ≥40% (balance primarily myristic, palmoyic, and stearic acids)
• concentración: ≥40.0%
• técnicas: cell culture | mammalian: suitable
• índice de refracción: n20/D 1.468 (lit.)
• CMC: 0.06 mM (20-25°C)
• temperatura de transición: cloud point 76 °C
• densidad: 1.095 g/mL at 25 °C (lit.); 1.1 g/cm³ at 25 °C (lit.)
• HLB: 16.7
• cadena SMILES: 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
• Clave InChI: HMFKFHLTUCJZJO-UHFFFAOYSA-N

Descripción

Descripción general

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.

Aplicación

TWEEN 20 has been used in staining buffer for in situ hybridization. It has also been used to prevent non-specific adsorption of proteins to coverslip during sample preparation for FRET (Förster resonance energy transfer) experiments.

TWEEN 20 is a nonionic detergent widely used in biochemical applications. It has been used as an emulsifying agent for the preparation of stable oil-in-water emulsions. TWEEN 20 has been used in pre-extraction of membranes to remove peripheral proteins (used at 2% for extraction of membrane-bound proteins).
TWEEN 20 has been used as a blocking agent for membrane based immunoassays at a typical concentration of 0.05%. TWEEN 20 can be used for lysing mammalian cells at a concentration of 0.005 to 0.5%.

Detergente no iónico

Precaución

TWEEN 20 may not be stable to autoclaving, particularly with metal cations in buffer solutions. Autoclaving is not recommended without testing for changes in properties. TWEEN 20 is heat sensitive and will darken when exposed to elevated temperatures. Polysorbates have been reported to be incompatible with alkalis, heavy metal salts, phenols, and tannic acid. They may also reduce the activity of many preservatives. Aqueous solutions of polysorbates undergo autoxidation during storage, with changes being catalyzed by light, increased temperature, and copper sulfate.

Nota de preparación

TWEEN 20 is miscible in water (100mg/mL), yielding a clear, yellow solution. It is also miscible with alcohol, dioxane, and ethyl acetate. TWEEN 20 is insoluble in liquid paraffin and fixed oils.

Información legal

TWEEN is a registered trademark of Croda International PLC

Información de seguridad

• Código de clase de almacenamiento: 10 - Combustible liquids
• Clase de riesgo para el agua (WGK): WGK 1
• Punto de inflamabilidad (°F): 527.0 °F - Pensky-Martens closed cup
• Punto de inflamabilidad (°C): 275 °C - Pensky-Martens closed cup
• Equipo de protección personal: Eyeshields, Gloves