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P9187 Sigma

SIGMAFAST OPD

tablet

Synonym: OPD Peroxidase Substrate

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Description

Application

SIGMAFAST OPD (o-Phenylenediamine dihydrochloride) Tablets have been developed for use as a soluble substrate for the detection of peroxidase activity in enzyme immunoassays (EIA). OPD is the EIA substrate of choice as it exhibits high sensitivity. EIA applications utilizing OPD may be read in timed assays or stopped with dilute acid solutions for delayed readings.

Caution

This substrate is hygroscopic and light sensitive

Features and Benefits

SIGMAFAST OPD Tablets require no additional buffers or steps to prepare an active substrate solution.

Reconstitution

Each tablet set dissolved in 20 mL deionized water yields a ready-to-use buffered solution containing OPD and urea hydrogen peroxide.

One OPD tablet and one urea hydrogen peroxide/buffer tablet, dissolved in 20 ml of water, provides 20 ml of ready-to-use substrate. When the tablet is dissolved in this manner, the final concentrations will be 0.4 mg/ml OPD, 0.4 mg/ml urea hydrogen peroxide, and 0.05 M phosphate-citrate, pH 5.0. Tablets are individually packaged in foil packets.

Legal Information

SIGMAFAST is a trademark of Sigma-Aldrich Co. LLC

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RIDADR 
UN 3316 9
WGK Germany 
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Documents

Certificate of Analysis

Certificate of Origin

Protocols & Articles

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 substrat...
BioFiles 2008, 3.4, 6.
Keywords: Applications, Enzyme-linked immunosorbent assay, Formulations, Immunohistochemistry, Western blot

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Antibody Explorer | Buy Primary & Secondary Antibodies

Monoclonal and polyclonal primary antibodies are focused on cell biology, neurobiology and molecular biology. Secondary antibodies targeting multiple host’s IgG are conjugated to alkaline phosphatase...
Keywords: Amplification, Buffers, Cell biology, Enzyme-linked immunosorbent assay, Immunofluorescence, Immunohistochemistry, Immunoprecipitation, Molecular biology, Phosphorylations, Purification, Western blot

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