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546976 Aldrich

Dowex® MAC-3 hydrogen form

hydrogen form



Related Categories Analytical/Chromatography, Anion, Cation, Cation Exchange Media, Dowex,
parameter   120 °C max. temp.
moisture   44-52%
matrix   acrylic polymer (macroporous)
particle size   12-50 mesh
  300-1200 μm
operating pH   4 - 14
capacity   3.8 meq/mL by wetted bed volume



1 kg in poly bottle

250 g in poly bottle


Dowex MAC-3 was used in the separation and pre-concentration of metal ions in alcohol. It was also used as packaging material in chromatographic columns for purification.

Weakly acidic cation exchanger for water treatment, dealkalization, purification of antibiotics, pharmaceuticals and amino acids, etc. The macroporous matrix gives the resin good resistance to osmotic shock, while maintaining a high regeneration efficiency.

General description

Dowex MAC-3 contains carboxylic acid as functional group and is selective for Cu and Fe. The resin has larger exchange capacity and large particle size.

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

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


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
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


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

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