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T3405

Sigma-Aldrich

3,3′,5,5′-Tetramethylbenzidine dihydrochloride

chromogenic, tablet

Synonym(s):

4,4′-Diamino-3,3′,5,5′-tetramethylbiphenyl dihydrochloride

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About This Item

Empirical Formula (Hill Notation):
C16H20N2 · 2HCl
CAS Number:
64285-73-0
Molecular Weight:
313.27
EC Number:
264-769-6
MDL number:
MFCD00012961
UNSPSC Code:
12352204
PubChem Substance ID:
24900140
NACRES:
NA.83

product name

3,3′,5,5′-Tetramethylbenzidine dihydrochloride, tablet, 1 mg substrate per tablet

Quality Level

200

form

tablet

mp

≥300 °C

storage temp.

2-8°C

SMILES string

Cl[H].Cl[H].Cc1cc(cc(C)c1N)-c2cc(C)c(N)c(C)c2

InChI

1S/C16H20N2.2ClH/c1-9-5-13(6-10(2)15(9)17)14-7-11(3)16(18)12(4)8-14;;/h5-8H,17-18H2,1-4H3;2*1H

InChI key

NYNRGZULARUZCC-UHFFFAOYSA-N

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Application

3,3′,5,5′-Tetramethylbenzidine dihydrochloride has been used as a substrate for the
  • anti-mouse IgG (? specific) horseradish peroxidase-conjugated antibody in the ELISA of mice sera
  • anti-mouse peroxidase antibody in the protein tyrosine phosphatase assay of naive and effector T cell lysate
  • in enzymatic hydroperoxide (EH) assay and in prooxidants–antioxidants balance (PAB) assay of serum samples from diabetic patients

3,3′,5,5′-Tetramethylbenzidine (TMB) is a peroxidase substrate suitable 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.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Yan-Qin Huang et al.
Analytical and bioanalytical chemistry, 410(28), 7385-7394 (2018-09-15)
We certify that protamine-gold nanoclusters (PRT-AuNCs) synthesized by one-pot method exhibit peroxidase-like activity. The catalytic activity of PRT-AuNCs followed typical Michaelis-Menten kinetics and exhibited higher affinity to 3,3',5,5'-tetramethylbenzidine (TMB) as the substrate compared to that of natural horseradish peroxidase. Meanwhile
Beth C Holbrook et al.
Virology, 476, 124-133 (2014-12-30)
Respiratory infection of young infants results in increased morbidity and mortality compared to infection of adults. In spite of the significance of this health issue, our understanding of the immune response elicited in infants especially in the respiratory tract is
Targeting phospho-Ser422 by active Tau Immunotherapy in the THYTau22 mouse model: a suitable therapeutic approach
Troquier L, et al.
Current Alzheimer Research, 9(4), 397-405 (2012)
Darcy S O Mora et al.
Fish & shellfish immunology, 71, 255-263 (2017-09-04)
An experimental contraceptive vaccine was evaluated in Atlantic salmon (Salmo salar). A peptide derived from the beta subunit of luteinizing hormone (LH) was conjugated to two different carrier proteins, bovine serum albumin (BSA) and keyhole limpet hemocyanin (KLH), and formulated
Thiru Vanniasinkam et al.
Methods in molecular biology (Clifton, N.J.), 1785, 121-128 (2018-05-02)
This chapter describes a strategy for mapping linear B-cell epitopes of proteins using synthetic biotinylated peptides in an ELISA.A set of overlapping peptides were designed based upon a known amino acid sequence of the target protein, VapA (Virulence-associated Protein A)
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Articles

Colorimetric Alkaline Phosphatase and Peroxidase Substrate Detection Systems

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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