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E5630 Sigma

β-Estradiol 6-(O-carboxy­methyl)oxime: BSA



Frequently Asked Questions

Frequently Asked Questions are available for this Product.


5, 10, 25 mg in glass bottle

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Safety & Documentation

Safety Information

Signal word 
Hazard statements 
Precautionary statements 
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
What is the molecular weight of Product E5630, β-Estradiol 6-(O-carboxy­methyl)oxime: BSA?
The Certificate of Analysis has lot specific information for the number of moles of steroid per mole of bovine serum albumin.  From this data and the molecular weights of the components, an approximate molecular weight for the compound can be calculated.  For example, if the moles of beta estradiol to BSA is 32, then the approximate molecular weight for the compound is 76.4 kDa (BSA has a molecular weight of approximately 66.4 kDa and 32 moles of estradiol is approximately 10 kDa more).
What is the shelf life of Product E5630, β-Estradiol 6-(O-carboxy­methyl)oxime: BSA?
There is no assigned shelf life date for the product.  The guarantee of quality is one year from the time customer receives the product for unopened bottles stored at 2-8°C.
What is the solubility of Product E5630, β-Estradiol 6-(O-carboxy­methyl)oxime: BSA?
We have solubilized the product in phosphate buffered saline at 1 mg/mL.  Solutions may be somewhat hazy.
What is the solution stability of Product E5630, β-Estradiol 6-(O-carboxy­methyl)oxime: BSA?
We have not performed solution stability studies, and have found no information on solution stability in the literature. We would therefore recommend using freshly prepared solutions.
How is Product E5630, β-Estradiol 6-(O-carboxy­methyl)oxime: BSA, prepared?
Our method of preparation is considered proprietary information  However, a method of preparation (not necessarily Sigma-Aldrich’s) has been described in J. Biol. Chem., 228, 713-727 (1957).
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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