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3,3′,5,5′-Tetramethylbenzidine (TMB) Liquid Substrate System for Membranes

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TMB membrane substrate

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General description

3,3′,5,5′-Tetramethylbenzidine (TMB) is a chromogenic substrate for horseradish peroxidase (HRP) conjugates. It develops a permanent, insoluble, dark blue reaction product and is useful in colorimetric quantification.


3,3′,5,5′-Tetramethylbenzidine (TMB) Liquid Substrate System for Membranes has been used as a chromogenic substrate in western blot analysis. It has also been used as a liquid substrate in enzyme-linked immunosorbent assay (ELISA).
3,3′,5,5′-Tetramethylbenzidine (TMB) Liquid Substrate System for Membranes has been used in:
  • enzyme-linked immune absorbent spot (ELISPOT) assay
  • as a substrate for IgG peroxidase
  • in the visualization of immunocomplexes

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Storage Class

12 - Non Combustible Liquids




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Not applicable

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Nitroblue Tetrazolium (NBT) is used with the alkaline phosphatase substrate 5-Bromo- 4-Chloro-3-Indolyl Phosphate (BCIP) in western blotting and immunohistological staining procedures. These substrate systems produce an insoluble NBT diformazan end product that is blue to purple in color and can be observed visually.

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