For purification of this Albumin an extensive heat-shock/diafiltration method is used, which has been shown to bring more highly purified products than the standard process acc. to Cohn. The process is taking place in a closed system. Molar extinction coefficient: 4,4x10 4 L x mol -1 x cm -1 (acc. to 0,667 L x mol -1 x cm -1 for a 0,1 % solution). Bovine Serum Albumin (BSA) Fraction V, US-Origin ≥98 %, protease-free, IgG-free Albumin, highly purified and tested for the presence of immunoglobulins (IgGs) The Albumin, IgG-free, US-Origin is especially recommended to stabilize antibody solutions and as blocking reagent in all assays working with antibodies. Due to its particularly low protease content, it is also well suited for use in all other protein assays that could be interfered with by protease presence. Tested for the presence of proteases and IgGs.