A7906 Sigma-Aldrich

Bovine Serum Albumin

heat shock fraction, pH 7, ≥98%

Synonym: Albumin bovine serum, BSA, Bovine albumin



Related Categories Albumin, Biochemicals and Reagents, Bovine Serum Albumins, Core Bioreagents, General Reagents,
assay   ≥98%
form   lyophilized powder
mol wt   mol wt ~66 kDa
purified by   heat shock fractionation
packaging   poly bottle of
origin   USA origin
loss   ≤5%
pH   7
solubility   water: soluble (40 mg/ml)
storage temp.   2-8°C


Frequently Asked Questions

Frequently Asked Questions are available for this Product.


1, 5, 10 kg in poly drum

10, 50, 100, 500 g in poly bottle

Preparation Note

Prepared using heat shock fractionation.

Serum albumin may be referred to as Fraction V. This naming convention is taken from the original Cohn method of fractionating serum proteins using cold ethanol precipitation. Serum albumin was found in the fifth ethanol fraction using Cohn′s method. Since then, the term "Fraction V" has been used by some to describe serum albumin regardless of the method of preparation. Others have used this term to describe serum albumin purified by ethanol fractionation methods that have been highly modified since the original Cohn method was described. Sigma-Aldrich manufactures and distributes serum albumins purified from a variety of primary methods including the true Cohn fractionation method, modified ethanol fractionation methods, heat shock and chromatography. Additional purification steps may include crystallization or charcoal filtration.


Bovine serum albumin has been used-
• as a component of PCR (polymerase chain reaction) mix
• in the preparation of dissociated cortical neurons
• during immunofluorescent labeling
• as a component of Ca2+-free saline (containing collagenase, hyaluronidase and DNAse) used for bovine tissue digestion

Biochem/physiol Actions

Certain conformational and primary-sequence epitopes of BSA are suspected allergens in human beef and milk allergies.

Price and Availability

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 

Frequently Asked Questions

Is Product A7906, Albumin from bovine serum (BSA), suitable for use as a blocking agent in ELISA?
We have not tested the use of A7906 in ELISA. Because the remainder of the product is mostly globulins, we would not suggest A7906 for ELISA use.
Is Product A7906, Albumin from bovine serum (BSA), protease-free?
We have not tested A7906 in quality control to be protease-free. Other BSA products to suggest that are protease-free would be A3059 or B6917.
Can Product A7906, Albumin from bovine serum (BSA), be used in immunohistochemistry?
We have not ourselves tested A7906 for use in immunohistochemistry. However, a literature search can turn up publications that cite this use, such as this paper: Surendran, K., et al., Wnt-Dependent Beta-Catenin Signaling Is Activated after Unilateral Ureteral Obstruction, and Recombinant Secreted Frizzled-Related Protein 4 Alters the Progression of Renal Fibrosis. J. Am. Soc. Nephrol., Vol. 16, pp. 2373-2384 (2005).
Is Product A7906, Albumin from bovine serum (BSA), tested for insulin levels?
A7906 is not tested in quality control for insulin levels. One BSA that is indicated as "suitable for insulin RIA procedures" is A7888.
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. 
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.
I need help selecting an Albumin from bovine serum (BSA) product, is there a guide to help me choose the best product?
Yes,  a selection guide to our BSA products can be found at the link below:
Show more questions
Protocols & Articles
Peer-Reviewed Papers


Related Products

also commonly purchased with this product

Product #


Add to Cart

P8340 Protease Inhibitor Cocktail, for use with mammalian cell and tissue extracts, DMSO solution
Z350370 Carestream® Kodak® BioMax® MR film, size 8 in. (20 cm) × 10 in. (25 cm)
P7949 TWEEN® 20, BioXtra, viscous liquid
P1379 TWEEN® 20, viscous liquid


Product #


Add to Cart

CLS3401 Corning® Transwell® polycarbonate membrane cell culture inserts, 12 mm Transwell with 0.4 μm pore polycarbonate membrane insert, TC-treated, w/ lid, sterile, 48/cs
CLS3422 Corning® Transwell® polycarbonate membrane cell culture inserts, 6.5 mm Transwell with 8.0 μm pore polycarbonate membrane insert, TC-treated, w/lid, sterile, 48/cs

related product

Product #


Add to Cart

08168 Timestrip Plus 8 °C

suggested gloves for splash protection

Product #


Add to Cart

Z677256 Dermatril nitrile gloves, size XS
Z677264 Dermatril nitrile gloves, size S
Z677272 Dermatril nitrile gloves, size M
Z677280 Dermatril nitrile gloves, size L
Z677299 Dermatril nitrile gloves, size XL
Z677302 Dermatril nitrile gloves, size XXL

Technical Service:

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Bulk Ordering & Pricing:

Need larger quantities for your development, manufacturing or research applications?