tablet, 1 mg substrate per tablet

TMB substrate, TMB, Sure Blue TMB, BM blue, TMB Blotting Plus
Linear Formula:
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
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PubChem Substance ID:

Quality Level




168-171 °C (lit.)

storage temp.


SMILES string




InChI key


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3,3′,5,5′-Tetramethylbenzidine has been used as a substrate in competitive enzyme-linked immunosorbent assay (ELISA) and indirect ELISA.
3,3′,5,5′-Tetramethylbenzidine (TMB) is a noncarcinogenic substitute (Ames test negative) for benzidine suitable as peroxidase substrate for use in ELISA procedures. The substrate produces a soluble end product that is pale blue in color and can be read spectrophotometrically at 370 or 620-650 nm. The TMB reaction may be stopped with 2 M H2SO4 (resulting in a yellow color), and read at 450 nm. A sensitive and specific reagent for the detection of blood, assay of hemoglobin, assay of peroxidases.


11 - Combustible Solids

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Immunoreactive properties of peptide fractions of cow whey milk proteins after enzymatic hydrolysis
Wroblewska B, et al.
Polish Journal of Food and Nutrition Sciences, 39(8), 839-850 (2004)
Effect of acylation and enzymatic modification on pea proteins allergenicity
Szymkiewicz, A and Jedrychowski, L
Polish Journal of Food and Nutrition Sciences, 58(3) (2008)
Lactobacillus casei LcY decreases milk protein immunoreactivity of fermented buttermilk but also contains IgE-reactive proteins
Wroblewska B, et al.
Food Research International, 83, 95-101 (2016)
Simon Z He et al.
Leukemia & lymphoma, 56(5), 1406-1415 (2014-09-25)
Acute myeloid leukemia (AML) blasts express high levels of interlekin-3 (IL-3) receptor-α (CD123). CSL360 is a recombinant, chimeric immunoglobulin G1 (IgG1), anti-CD123 monoclonal antibody (MoAb) that neutralizes IL-3 and demonstrates anti-leukemic activity in vitro. This phase 1 study assessed safety...
Ronit Mazor et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(23), 8571-8576 (2014-05-07)
Nonhuman proteins have valuable therapeutic properties, but their efficacy is limited by neutralizing antibodies. Recombinant immunotoxins (RITs) are potent anticancer agents that have produced many complete remissions in leukemia, but immunogenicity limits the number of doses that can be given...
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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