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44504 Sigma-Aldrich

Dowex® 50W X8

hydrogen form, strongly acidic, 16-50 mesh

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Properties

Related Categories Analytical/Chromatography, Cation, Cation Exchange Media, Dowex, Dowex Strong Cation Exchangers,
cross-linkage   8%
moisture   50-58%
matrix   styrene divinylbenzene (gel)
particle size   16-50 mesh
capacity   1.1 meq/mL by wetted bed volume

Description

Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Packaging

100 g in poly bottle

Application

Dowex 50WX8 hydrogen form may be used in separation medium for TLC, paper chromatography and LPLC.

General description

Dowex 50WX8 hydrogen form is used as stripper resin and can be regenerated by 0.25N sulphuric acid when exhausted. Dowex 50WX8 hydrogen form is used as catalyst. It is used in deionizing supernatant fraction samples for paper chromatography.

Legal Information

DOWEX is a registered trademark of The Dow Chemical Company or an affiliated company of Dow

Price and Availability


Laboratory Gloves
Safety & Documentation

Safety Information

Symbol 
GHS07  GHS07
Signal word 
Warning
Hazard statements 
Precautionary statements 
Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
3

Documents

Certificate of Analysis

Certificate of Origin

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
What is the form of Product 44504, Dowex® 50W X8?
This resin is a strongly acidic cation exchanger, in the H+ ionic form.
What is a p.a. grade?
Pro analysi (per analysis, or p.a.) grade chemicals are tested to similar - although not identical - standards as are ACS reagents. P.a. grade material are suitable for many routine laboratory applications.
What is the particle size of Product 44504, Dowex® 50W X8?
The mesh size (20-50 mesh) corresponds to a particle size range of approximately 300 to 850 microns.
What is the matrix for the Dowex® 50W X8 resin, Product 44504?
The fine mesh resin is based on a microporous copolymer of styrene and divinylbenzene (DVB) (styrene-DVB gel).
What is the total exchange capacity of the Dowex® 50W X8 resin, Product 44504, in equivalents per Liter (eq/L)?
The exchange capacity is approximately 1.7 eq/L or meq/mL. One equivalent means one mole of ionizable functional group on the resin.
What is the suggested operating temperature for Dowex® 50W X8 resin, Product 44504?
At elevated temperature, operation can cause degradation of functional sites and loss of the ion exchange capacity. The resin degradation  depends on many variables, such as  the level of dissolved oxygen and the presence of catalytic metals on the resin. In general, ~120oC (250oF) is suggested as the maximum operating temperature.
What are the proper storage conditions for Dowex® 50W X8 resin, Product 44504?
The resins should be stored in a dry cool place. The storage temperature should be kept below 50oC (120oF).Storage temperature below 0oC can cause resin freezing and temperatures below -18oC (0oF) should be avoided. Repeated freeze-thaw can cause damage on the beads. The frozen resin beads should be completely thawed out at room temperature condition before loading and use.
What information do you have on the stability of Dowex® 50W X8 resin, Product 44504?
The ion exchange resin is tolerant of a wide range of chemical conditions, including most inorganic and organic solutions with exception of strong oxidizing agents. Solutions, such as nitric or chromic acid, bleach or chlorine-generating solutions as well as peroxide should be avoided as these will result in rapid oxidation. Exposure of resins to metal ions, such as iron, manganese and copper should be minimized in oxidizing environments as they can catalyze the oxidation.
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. 
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.
How can I convert a cation exchange resin from the hydrogen form to the sodium form?
To convert a cation exhcange resin from the hydrogen form to the sodium form, use two to four bed volumes of 0.5-2.0% NaCl or NaOH.  Click here for more details.  
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Protocols & Articles

Articles

Selection Guide for Polymeric Resins in Chromatography & Purification

Sigma-Aldrich carries a vast array of resins, from leading manufacturers; such as, Dow Chemical, Rohm & Haas, Mitsubishi, and Lanxess. Our product line includes adsorbent, ion-exchange (anion / catio...
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Peer-Reviewed Papers
15

References

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