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217395 Sigma-Aldrich

Dowex® 1X2 chloride form

200-400 mesh

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Properties

Related Categories Analytical/Chromatography, Anion Exchange Media, Dowex Strong Anion Exchangers, Resins & LC Separation Media, Resins and Media More...
crosslinking   2 % cross-linked
parameter   66 °C max. temp.
  99 °C max. temp.
cross-linkage   2%
matrix   styrene-divinylbenzene (gel)
matrix active group   trimethylbenzylammonium functional group
particle size   200-400 mesh
operating pH   0 - 14
capacity   0.7 meq/mL by wetted bed volume
  65-75 % water retention capacity

Description

Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Application

Strongly basic (type I) anion exchange resin for food & drug processing; meets requirements of FDA Food Additive Regulation 21 CFR 173.25

Dowex® 1X2 chloride form was used to separate cadmium from seawater matrix using column chromatography. It was used in column for gas chromatography-mass spectrometric analysis.

Features and Benefits

strongly basic anion.

Other Notes

This ion-exchange resin has not been specially processed nor cleaned. We suggest that it be treated to a suitable preliminary elution and wash.

Packaging

100, 500 g in poly bottle

General description

Dowex® 1X2 is an anion exchange resin.

Legal Information

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

Price and Availability

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
2

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. 
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 a Dowex type 1 resin in the chloride form be converted to the carbonate form?
As one might expect, the procedure requires the use of sodium carbonate (Na2CO3). Citation: Journal of Experimental Medicine, 120, 1007-1018 (1965). From page 1011 of that paper: "A 2 mL column of washed Dowex-1X8 200 to 400 mesh, in the chloride form, was converted to the carbonate form by washing with 1 M Na2CO3 until no chloride could be detected in the eluate. It was then washed with distilled water until the pH of the eluate reached neutrality." The simplest test for chloride is to use a dilute silver nitrate solution. If mixing a few drops of the eluate with a few drops of a silver nitrate solution results in a silver chloride precipitate forming, that would an indication that the eluate contains chloride. You could also use a chloride-specific electrode, if you have access to one.
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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...
Keywords: Adsorption, Antibiotics, Detergents, Fermentation, Filtration, Hormones, Ion Exchange, Pharmaceutical, Purification, Separation

Peer-Reviewed Papers
15

References

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