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63158 Sigma

TWEEN® 20

Synonym: Polyethylene glycol sorbitan monolaurate, Polyoxyethylenesorbitan monolaurate

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Properties

Related Categories Antigen-Vaccine Preparation, Biochemicals and Reagents, Cell Culture, Detergents, Detergents A to M,
description   non-ionic
mol wt   mol wt ~1228
refractive index   n20/D 1.468(lit.)
hydroxyl value   96‑108
density   1.095 g/mL at 25 °C(lit.)

Description

Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Application

Non-ionic detergent

Legal Information

TWEEN is a registered trademark of Croda International PLC

Price and Availability


Laboratory Gloves
Safety & Documentation

Safety Information

Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
1
RTECS 
TR7400000
Flash Point(F) 
>230 °F
Flash Point(C) 
>110 °C

Documents

Certificate of Analysis

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
How do I find price and availability?
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. 
What is the Department of Transportation shipping information for this product?
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, or search here. 
What is the purity of Product 63158, TWEEN® 20?
Tween 20 is Polyoxyethylenesorbitan monolaurate. Product No. 63158 is not assayed for % purity. In our specifications, we have a hydroxyl value of 96-108.
What are the impurities that may be present in Product 63158, TWEEN® 20?
We do not test for impurities of the Tween 20.
Can solutions of Product 63158, TWEEN® 20, be autoclaved?
Increased temperatures can lead to autoxidation of Tween 20. Autoclaving is not recommended without testing for changes in the properties. Tween 20 may not be stable to autoclaving, particularly with metal cations in buffer solutions. Autoclaving is done at the customer's discretion.
What is the purity of Product 63158, TWEEN® 20?
Tween 20 is polyethoxysorbitan laurate. It is not assayed for % purity. In our specifications, we do have a hydroxyl value of 96-108. This means that we analyze the OH groups at the end of the chain. With this result, the amount of polyethoxysorbitan laurate can be calculated.
What are the impurities that may be present in Product 63158, TWEEN® 20?
We do not test for impurities of the Tween 20. However, the supplier states that there is: <3% water, <10 ppb heavy metals (as lead), and <1ppm arsenic.
What is the percentage of Tween 20 in Product 63158?
This product is not dissolved in a solvent and therefore can be considered as "100%" Tween 20.
Can solutions of Product 63158, TWEEN® 20, be autoclaved?
Increased temperatures can lead to autoxidation of Tween 20. Autoclaving is not recommended without testing for changes in the properties. Tween 20 may not be stable to autoclaving, particularly with metal cations in buffer solutions. Autoclaving is done at the customer's discretion.
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
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Protocols & Articles
Peer-Reviewed Papers
15

References

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Product #

Description

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274348 TWEEN® 20, average Mn ~1,228

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