Skip to Content
Merck
All Photos(2)

Documents

T8768

Sigma-Aldrich

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

powder, ≥98%

Synonym(s):

TMB dihydrochloride

Sign Into View Organizational & Contract Pricing
All Photos(2)

About This Item

Linear Formula:
[-C6H2(CH3)2-4-NH2]2·2HCl·xH2O
CAS Number:
207738-08-7
Molecular Weight:
313.27 (anhydrous basis)
MDL number:
MFCD00150104
UNSPSC Code:
12352204
PubChem Substance ID:
24900558
NACRES:
NA.83

Quality Level

200

Assay

≥98%

form

powder

solubility

acetic acid: water (1:2): 20 mg/mL, clear to slightly hazy

storage temp.

2-8°C

SMILES string

O.Cl.Cl.Cc1cc(cc(C)c1N)-c2cc(C)c(N)c(C)c2

InChI

1S/C16H20N2.2ClH.H2O/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;1H2

InChI key

KVCWTKDFVVSVSJ-UHFFFAOYSA-N

Looking for similar products? Visit Product Comparison Guide

Related Categories

General description

3,3′,5,5′-Tetramethylbenzidine dihydrochloride hydrate (TMB-d) is a sensitive chromogen substrate for peroxidase. It is non- carcinogenic, hence, it can be used as a safe substitute for benzidine. TMB-d is useful in quantifying hemoglobin and in staining myeloperoxidase-containing granules in granulocytes.

Application

3,3′,5,5′-Tetramethylbenzidine dihydrochloride hydrate has also been used as a horseradish peroxidase substrate in enzyme linked immunosorbent assay and reverse dot blot (RDB).
Noncarcinogenic substitute for benzidine.

Signal Word

Danger

Hazard Statements

H302 - H350 - H410

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1A

Storage Class Code

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

EU REACH Annex XVII (Restriction List)

CAS No.

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’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Detection of Antibodies Against DNA Polymerase of Hepatitis B Virus in HBsAg-Positive Sera Using ELISA
Rui LX, et al.
The Korean Journal of Internal Medicine, 13, 95-95 (1998)
Robot Printing of Reverse Dot Blot Arrays for Human Mutation Detection
Lappin S, et al.
The Journal of Molecular Diagnostics : JMD, 3, 178-178 (2001)
Quantitative determination of hemoglobin and cytochemical staining for peroxidase using 3, 3?, 5, 5?-tetramethylbenzidine dihydrochloride, a safe substitute for benzidine
Liem HH, et al.
Analytical biochemistry, 98(2), 388-393 (1979)
Lymphocyte Homing to the Skin: Immunology, Immunopathology, and Therapeutic Perspectives (2004)
Virginia Protto et al.
Hippocampus, 29(10), 891-904 (2019-03-15)
Diabetes induces early sufferance in the cholinergic septo-hippocampal system, characterized by deficits in learning and memory, reduced hippocampal plasticity and abnormal pro-nerve growth factor (proNGF) release from hippocampal cells, all linked to dysfunctions in the muscarinic cholinergic modulation of hippocampal

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.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service