Thermo Scientific™ Blocker™ BSA Blocking Buffers

Block membranes, plates and other samples with these ready-to-use 10X PBS or TBS solutions of bovine serum albumin for Western blot, ELISA and other detection methods.

Brand: Thermo Scientific™

Manufacturer Part Number: 37520


UNSPSC: 41105300

Code: PN

Additional Details:
Additional Details: CAS Number: 36052-24-1 Weight: 0.80000kg

Product Code. 11889310

Quantity Price
1 £122.00 / 125mL
EU Stock 8
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Description and Specification


Applications ELISA, IHC, WB
Description Blocker BSA in TBS (10X)
Formulation 10% (w/v) bovine serum albumin in Tris-buffered saline, pH 7.4, with Kathon preservative
Quantity 125mL
Sufficient For 40 blots or microplates at 1% and 30mL each

These blocking buffers are 10% (w/v) solutions of high-quality BSA that are useful for saturating excess protein-binding sites on membranes and microplates in immunoassays. Blocker BSA Buffers are most frequently diluted 10-fold (to 1% BSA) for initial testing, but other buffer concentrations can be beneficial for specific systems. Blocker BSA is usually more effective than nonfat milk blocking buffers for biotin-avidin systems because it contains a single purified protein that is devoid endogenous biotin.


  • Purified protein – 10% solutions of high-quality bovine serum albumin; a single purified protein provides fewer chances of cross-reaction with assay components than serum or milk solutions

  • Convenient – concentrated formulation saves storage space and can be diluted easily to obtain optimal blocking results for specific applications

  • Easy to use – no waiting for powder to dissolve with this ready-to-dilute liquid concentrate

  • Flexible – available in PBS and TBS formulations to suit a variety of applications


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