Bovine Serum Albumin (BSA), Fraction V, Protease Free

Product Description

GoldBio's Caprylate Stabilized BSA is a highly purified, lyophilized albumin, suitable for Westerns, enzyme systems, protein standards, hybridizations and as a protease-sensitive immunoassays. It is also perfectly suitable as a nutrient in cell culture media, with low interference and backgrounds and is ideal for most standard molecular biology experiments.

Caprylate stabilized BSA has exceptional purity and low interference, utilizing heat-shock fractionation designed to inactivate proteases and other potentially interfering enzymes.

BSA protein is a single polypeptide chain consisting of ~583 amino acid residues and no carbohydrates and is approximately 66 kDa in size. Fraction V refers to the fifth fraction of the original Cohn purification of plasma proteins using cold ethanol precipitation and is still commonly used as a name for bovine serum albumin regardless of purification method.

GoldBio BSA is protease and certified TSE free, manufactured in the United States in a closed loop system from USDA-inspected, healthy animals located in the US.


  • Western Blotting
  • Protein Standard
  • Hybridizations
  • Immunoassays
  • Molecular Biology standard
  • Cell Culture media


Protein (on Dried Basis)


Purity (albumin)




pH (10% in Water)

6.5 to 7.5

Ash (Residue on Ignition)


Protease (Enzymatic Assay)

≤0.001 Units/mg


≤1 EU/mg

Heavy Metals (Pb)

≤10 ppm


None Detected


Store at 4°C.

Product Specifications

Name(s) Albumin Bovine Serum (Caprylate Stabilized), Fraction V;
BSA, Bovine Albumin
Catalog ID A-420
CAS # 9048-46-8
MW ~66 kDa
Purity ≥98.0%
Storage/Handling Store at 4°C.

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$12.99 Ground shipping (In continental US only.)

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