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o-Dianisidine dihydrochloride

tablet, 10 mg substrate per tablet

Fast Blue B, 3,3′-Dimethoxybenzidine dihydrochloride
Empirical Formula (Hill Notation):
C14H16N2O2 · 2HCl
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level




water: 1 tablet/10 mL, clear, colorless

storage temp.


SMILES string




InChI key


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o-Dianisidine (3,3′-dimethoxybenzidine) is a peroxidase substrate suitable for use in ELISA procedures. This substrate produces a soluble end product that is yellow-orange in color and can be read spectrophotometrically at 405 nm. The reaction may be stopped with 5 M HCl.


50, 100 tablets in glass bottle


Probably carcinogenic.


Dissolve one tablet in 60 ml of 50 mM phosphate-citrate buffer, pH 5.0. Add 12 μl of fresh 30% hydrogen peroxide immediately before to use.


Exclamation markHealth hazard

Signal Word


Hazard Statements

Hazard Classifications

Acute Tox. 4 Oral - Carc. 1B

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Certificate of Origin

Uta Merle et al.
Journal of hepatology, 51(5), 925-930 (2009-09-02)
A low serum ceruloplasmin concentration is considered diagnostic for Wilson's disease. We aimed to evaluate an enzymatic test for ceruloplasmin oxidase activity and to compare it with the routinely used immunological ceruloplasmin measurement. Serum ceruloplasmin was measured enzymatically with o-dianisidine
Iain S MacPherson et al.
Protein engineering, design & selection : PEDS, 23(3), 137-145 (2010-01-20)
Directed evolution methods were developed for Cu-containing nitrite reductase (NiR) from Alcaligenes faecalis S-6. The PCR cloning strategy allows for the efficient production of libraries of 100 000 clones by a modification of a megaprimer-based whole-plasmid synthesis reaction. The high-throughput
Wei Shen et al.
Biosensors & bioelectronics, 44, 171-176 (2013-02-22)
Herein we report a label-free microRNA (miRNA) biosensor in which the formation of a thin insulating film is used to amplify the analytical signal. Briefly, the biosensor is made of an oligonucleotide-coated gold electrode. After hybridizing with a target miRNA
Tatsuro Suzuki et al.
Phytochemistry, 67(3), 219-224 (2006-01-13)
A peroxidase (POX)-containing fraction was purified from buckwheat seed. The POX consisted of two isozymes, POX I and POX II, that were purified 6.6- and 67.4-fold, respectively. Their molecular weights were estimated to be 46.1 kDa (POX I) and 58.1
Rémy Ricoux et al.
Bioconjugate chemistry, 19(4), 899-910 (2008-03-08)
To develop artificial hemoproteins that could lead to new selective oxidation biocatalysts, a strategy based on the insertion of various iron-porphyrin cofactors into Xylanase A (Xln10A) was chosen. This protein has a globally positive charge and a wide enough active


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