lauric acid, ≥40% (balance primarily myristic, palmitic, and stearic acids)
DNA extraction: suitable
RNA extraction: suitable
cell culture | mammalian: suitable
protein purification: suitable
n20/D 1.468 (lit.)
0.06 mM (20-25°C)
cloud point 76 °C
1.095 g/mL at 25 °C (lit.)
complies for IR spectroscopy
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P1379 is not diluted in any solvent. Thus it can be considered "100%" or the "neat" material.
Increased temperature can lead to autoxidation of TWEEN 20 in solution. Autoclaving is not recommended without testing for changes in properties. TWEEN 20 may not be stable to autoclaving, particularly with metal cations in buffer solutions. TWEEN 20 is heat sensitive; it will darken when exposed to elevated temperatures. Autoclaving is done at the customer's risk.
Origin information on any lot of Tween 20 is specific to that lot, and can be found on its Certificate of Origin (CofO), which may be accessed on the Sigma-Aldrich website under its specific product and lot number.
Yes. The specifications for P1379 are "clear yellow to yellow green viscous liquid".
We have not tested P1379 in quality control to be protease-free. There is a Molecular Biology grade of Tween 20, P9416, but this is not tested specifically for proteases either. P9416 is tested to be endonuclease-endonuclease free and to be ribonuclease-free.
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 or view local office numbers.
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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