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Thermo Scientific™ BSA Blocking Buffer, 5% in PBS, with 0.05% Tween-20

BSA (bovine serum albumin) blocking buffer, 3% in PBS, is a blocking agent ideal for saturating excess protein-binding sites on membranes.



Storage Requirements -30°C to -10°C
Format Liquid
Product Type Blocking Buffer
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Products 2
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Catalog Number Mfr. No. Quantity Price Quantity & Availability  
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Thermo Scientific™
250 mL
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Thermo Scientific™
500 mL This item has been discontinued by the manufacturer and is no longer available. Please call customer service for assistance: 1-800-766-7000. N/A


Buffered BSA solution used to block ELISA strips and as a diluent of primary and secondary antibodies used for ELISA applications. BSA is useful for saturating excess protein-binding sites on membranes and microplates in immunoassays. Blocker BSA is usually more effective than nonfat milk blocking buffers for biotin-avidin systems. Use as a diluent for antigens, antibodies, and other proteins only after sensitization of the microwell plate or membrane.

This Thermo Scientific brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific.

General Description
• BSA blocking buffer contains a serum albumin protein isolated from a cow with a high affinity for proteins
• BSA (bovine serum albumin) blocking buffer is used as a blocking reagent ideal for saturating excess protein-binding sites on membranes and microplates for Western blotting and ELISA applications
• This buffer can be used in a range from 0.3% to 5% dissolved in PBS solution


-30°C to -10°C
Blocking Buffer
Safety and Handling

Safety and Handling

Recommended Storage : Store at -20°C

Product Certifications

RUO – Research Use Only

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