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T8665

Sigma-Aldrich

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

peroxidase substrate

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Synonym(s):
TMB
NACRES:
NA.83

Quality Level

form

liquid

storage condition

protect from light

shipped in

wet ice

storage temp.

2-8°C

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This Item
T0440T5569T9455
storage condition

protect from light

storage condition

-

storage condition

-

storage condition

-

shipped in

wet ice

shipped in

-

shipped in

wet ice

shipped in

-

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

Quality Level

300

Quality Level

300

Quality Level

-

Quality Level

200

Application

TMB is a substrate for horseradish peroxidase. Forms a soluble blue end product that may be read at 370 nm or 655 nm. The TMB reaction may be stopped with 0.5 M H2SO4, resulting in a yellow color, and read at 450 nm. Recommended for ELISA (microwell) procedures, not recommended for membrane applications.
3,3′,5,5′-Tetramethylbenzidine has been used in a study to demonstrate that by measuring substrate absorption values off the absorption maximum, the measuring range of any immunoenzymometric assay can be extended significantly without jeopardizing assay characteristics. 3,3′,5,5′-Tetramethylbenzidine has also been used in a study to understand the formation of CuS concave superstructures with peroxidase-like activity.

Caution

This substrate is very light-sensitive and should be protected from direct sunlight or UV sources.

Physical form

Ready-to-use.

Signal Word

Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Carc. 1A - Eye Irrit. 2 - Flam. Liq. 3 - STOT SE 1

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

129.9 °F - closed cup

Flash Point(C)

54.4 °C - closed cup


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Articles

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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