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T0440

Sigma-Aldrich

3,3′,5,5′-Tetramethylbenzidine

peroxidase substrate, chromogenic, liquid

Synonym(s):

TMB

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About This Item

UNSPSC Code:
12352204
NACRES:
NA.83

product name

3,3′,5,5′-Tetramethylbenzidine (TMB) Liquid Substrate System for ELISA, peroxidase substrate

Quality Level

form

liquid

storage temp.

2-8°C

General description

TMB substrate is a chromogenic substrate for horseradish peroxidase - HRP.

Application

TMB substrate is used in ELISA procedures, which utilize horseradish peroxidase conjugates. TMB substrate develops a soluble blue reaction product that can be read at 370 or 655 nm at 370 or 655 nm. The reaction is stopped with acid, forming a yellow reaction product which enables accurate intensity measurement at 450 nm.

How to use our TMB substrate:
  • Our TMB substrate is supplied as a ready-to-use peroxidase substrate containing TMB in a mildly acidic buffer. Prior to reaction with peroxidase, the substrate should be a colorless to light bluish-green solution. The substrate system develops a blue reaction product when reacted with peroxidase.
  • Upon reaching your assay endpoint with addition of acid, measure the TMB substrate intensity at 450 nm.
  • Our TMB Substrate is recommended for ELISA (microwell) procedures, and has been used in various assays, as a substrate for horseradish peroxidase antibody conjugate for detecting hendra virus glycoprotein, tetracosactide, sIgA and neutrophil extracellular traps (NETs).
  • 3,3′,5,5′-Tetramethylbenzidine (TMB) Liquid Substrate System is not recommended for membrane applications. Since TMB substrate produces a soluble reaction product, it is not recommended for histochemistry or blotting.
Note:TMB substrate is light-sensitive and should be protected from direct sunlight or UV sources.

recommended

Storage Class Code

10 - Combustible liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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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Denise Traxler et al.
Clinica chimica acta; international journal of clinical chemistry, 473, 127-132 (2017-08-29)
Heat shock proteins (HSPs) represent intracellular mechanisms of stress response. Clinical implications of their (systemic) expression in patients with chronic heart failure (HF) remain inconclusive. In outpatients with chronic stable HF plasma HSP27 levels were measured using ELISA. Patients were
Dorin Harpaz et al.
Diagnostics (Basel, Switzerland), 10(1) (2020-01-16)
Abstract: Paper-based colorimetric biosensors combine the use of paper with colorimetric signal detection. However, they usually demonstrate lower sensitivities because a signal amplification procedure has not been used. Stopping the reaction of colorimetric signal generation is often used in lab-based
Myeloid-specific deletion of peptidylarginine deiminase 4 (PAD4) mitigates atherosclerosis.
Liu Y, et al.
Frontiers in immunology, 9(4), 1680-1680 (2018)
Young Children Display Diurnal Patterns of Salivary IgA and Alpha-Amylase Expression Which Are Independent of Food Intake and Demographic Factors
Lim PW, et al.
BioMed Research International, 2019 (2019)
Spontaneous and tetracosactide-induced anti-ACTH antibodies in man
Gan EH, et al.
Clinical Endocrinology, 84(4), 489-495 (2016)

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