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Tween® 20

A polysorbate surfactant commonly used as a blocking and washing agent in Western blotting and other immunostaining assays.

Product Attributes

Storage Conditions

Store at room temperature

CAS number


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50 mL
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Product Description

Tween® 20 (polysorbate 20) is a non-ionic surfactant commonly used as a blocking and washing agent in western blotting and other immuno-staining assays. Tween® 20 is typically included in blocking buffers and washing buffers at a concentration of 0.05-0.1% to reduce non-specific antibody binding.

  • Used in western blot blocking and washing buffers
  • Used in ELISA washing buffers
  • Non-ionic surfactant
  • 50 mL size
  • Store at room temperature
TWEEN is a registered trademark of Croda International LLC.

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