lauric acid, ≥40% (balance primarily myristic, palmoyic, and stearic acids)
cell culture | mammalian: suitable
protein purification: suitable
≤0.05% Phosphorus (P)
n20/D 1.468 (lit.)
0.06 mM (20-25°C)
cloud point 76 °C
1.095 g/mL at 25 °C (lit.)
chloride (Cl-): ≤0.05%
sulfate (SO42-): ≤0.05%
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P7949 is not diluted in any solvent. Thus it can be considered "100%" or the "neat" material.If you still need to ask a question, please click the Ask a Question tab at the bottom of the page.
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.
"BioXtra" is the grade designation given to Sigma-Aldrich products that have been tested be low in trace metal content.
The specification for P7949 is a clear yellow-green liquid.
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.
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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