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613548

Sigma-Aldrich

TMB, Insoluble

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Synonym(s):
TMB, Insoluble, 3,3ʹ,5,5ʹ-Tetramethylbenzidine
CAS Number:
MDL number:

form

liquid

Quality Level

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze
protect from light

color

clearlight brown

shipped in

ambient

storage temp.

2-8°C

InChI

1S/C16H20N2/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

InChI key

UAIUNKRWKOVEES-UHFFFAOYSA-N

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This Item
860336T444487748
TMB, Insoluble

613548

TMB, Insoluble

3,3′,5,5′-Tetramethylbenzidine ≥99%

860336

3,3′,5,5′-Tetramethylbenzidine

3,3′,5,5′-Tetramethylbenzidine ≥98.0% (NT)

87748

3,3′,5,5′-Tetramethylbenzidine

form

liquid

form

powder

form

aqueous solution

form

powder

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

manufacturer/tradename

Calbiochem®

manufacturer/tradename

-

manufacturer/tradename

-

manufacturer/tradename

-

storage condition

OK to freeze

storage condition

-

storage condition

-

storage condition

-

color

clearlight brown

color

-

color

-

color

-

General description

Insoluble TMB substrate supplied as a single component system. TMB is the most sensitive chromogenic substrate for detection of horseradish peroxidase (HRP)-labeled probes. In the presence of HRP and hydrogen peroxide (H2O2), TMB is oxidized first to a blue, cation free radical; upon further reaction with HRP/H2O2, or addition of acid, the radical is converted to a yellow diimine terminal oxidation product. TMB is used routinely in ELISA procedures, whereby its soluble oxidation products are measured spectrophotometrically. For TMB to be worthwhile as a blotting reagent, enhancers such as dextran sulfate or other sugar polymers are usually added.This TMB reagent is a safe, single component system that has been developed for use in blotting procedures by a proprietary methodology that eliminates the use of sugar polymers. The reagent produces a stable, insoluble aquamarine precipitate at the reaction site with little or no background. It can significantly increase the detection limits of assays on a variety of membranes. Ideal for many immunoblotting procedures and can significantly increase detection limits of assays on a variety of membranes
Peroxidase substrate that produces a stable, insoluble, aquamarine blue precipitate at reaction site with little or no background.

Warning

Toxicity: Carcinogenic / Teratogenic (D)

Physical form

1.19 mM H₂O₂ in a proprietary solvent, 1.13 mM TMB, pH 4.9 ± 0.03.

Reconstitution

Discard if the solution turns blue or turbid. The reagent is stable at room temperature; refrigeration is recommended for long-term storage. Warm to assay temperature before use.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

pictograms

Exclamation markHealth hazard

signalword

Warning

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Chronic 4 - Carc. 2

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable


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Protocols

Western blotting involves protein separation by gel electrophoresis, protein transfer to a polyvinylidene difluoride (PVDF) or nitrocellulose membrane, and detection by various methods.

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