281530 Aldrich

Montmorillonite KSF

surface area 20-40 m2/g

Synonym: K-Catalyst



Related Categories Acids, Acids & Bases, Chemical Synthesis, Lewis Acids, Montmorillonite,
surface area   20-40 m2/g


Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Price and Availability

Cross-Coupling Guide
Safety & Documentation

Safety Information

Signal word 
Hazard statements 
Precautionary statements 
UN 3260 8 / PGII
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:
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. 
Do you have a product information sheet on Montmorillonite KSF, Product 281530?
Please see our technical bulletin on "Montmorillonites and Other Mineral Adsorbents" found at  The bulletin gives further physical property data on this product.
Is it possible for Montmorillonite KSF, Product 281530, to contain trace amounts of metallic components?
Yes. According to our supplier, it is possible for trace metals to be present. The most likely metallic component present is iron; however, barium, chromium, manganese, and nickel can also be present. However, Sigma-Aldrich does not perform quantitative metals testing on this material.
How can Montmorillonite KSF, Product 281530, be used?
K-type montmorillonites are acidic catalysts that can be used in some synthesis reactions in place of Bronsted acids (like H2SO4, HCl, H3PO4, HClO4, etc), or Lewis Acids (like BF3, BCl3, AlCl3, SnCl4, etc.). Although the pH is not tested by Sigma-Aldrich, it is reported to be about 1.5 for a 10% aqueous suspension of the clay catalyst. Montmorillonite KSF is easier to handle and less corrosive than the traditional aforementioned acid catalysts.
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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