A1076 Sigma


≥95% (HPLC)

Synonym: 1,2-Bis(2-aminophenoxy)ethane-N,N,N′,N′-tetraacetic acid tetrakis(acetoxymethyl ester)



Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Biochem/physiol Actions

Selective chelator of intracellular Ca2+ stores.


Membrane-permeable form of BAPTA.


25 mg in ampule

Price and Availability

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Safety & Documentation

Safety Information

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:
What is BAPTA-AM, Product A1076, and  how is it used?
BAPTA-AM is a cell-permeant acetoxymethyl ester derivative of BAPTA (Product No. A4926), which is used as a chelator of intracellular Ca2+ stores. The acetoxymethyl ester derivative, which is an ester of the carboxylic acid groups in BAPTA, results in an uncharged molecule which allows it to penetrate cell membranes. Inside the cell, these groups are cleaved by nonspecific esterase activity resulting in the free acid form.
In what solvents is BAPTA-AM, Product A1076, soluble?
BAPTA-AM is soluble in dimethyl sulfoxide (DMSO) at 25 mg/mL.  It is also soluble in acetonitrile at 0.5 mg/mL.  It is best to use anhydrous DMSO, since it is known that moisture uptake by the DMSO can adversely affect the quality of the BAPTA-AM.  
How would you recommend that I store my BAPTA-AM, Product A1076, solution?
Stock solutions of 1-10 mM can be prepared in anhydrous DMSO, divided into single-use aliquots, and stored desiccated and frozen at -20°C.
What are the shipping and storage temperatures for BAPTA-AM, Product A1076?
BAPTA-AM is shipped at ambient temperature.  The recommended storage temperature, once received, is -20 °C.
What is the typical working concentration for BAPTA-AM, Product A1076?
The typical final working concentrations for cell loading is in the range of 1 to 10 micromolar. It is best to find literature references dealing with your application for more information on the amounts to use. Some cited references are at our website:
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.
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