3,3’,5,5’-Tetramethylbenzidine

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3,3’,5,5’-Tetramethylbenzidine
Systematic name	3,3',5,5'-tetramethylbiphenyl-4,4'-diamine
Chemical formula	C16H20N2
Molecular mass	240.3482 g/mol
Density	? g/cm3
Melting point	192–196 °C
Boiling point	? °C
CAS number	[54827-17-7]
SMILES	NC1=C(C)C=C(C2=CC(C)=C(N)C(C)=C2)C=C1C
Disclaimer and references

3,3’,5,5’-Tetramethylbenzidine or TMB is a reagent used in staining procedures in immunohistochemistry.

It is a white crystal powder which should be protected from exposure to sunlight, and a mutagen.

Forms a blue mixture when combined with a peroxidase substrate; completion of the reaction results in a yellow coloration.

[edit] External links

• Safety (MSDS) data for 3,3',5,5'-tetramethylbenzidine
• Tetramethylbenzidine (TMB) - Ready to Use Chromogen
• Links to external chemical sources.