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Merck

P6912

o-Phenylenediamine dihydrochloride

peroxidase substrate, chromogenic, tablet

Synonym(s):

1,2-Phenylenediamine tablet, OPD, OPD Tablet

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About This Item

Linear Formula:
C6H4(NH2)2·2HCl
CAS Number:
615-28-1
Molecular Weight:
181.06
NACRES:
NA.83
PubChem Substance ID:
24898805
UNSPSC Code:
12352204
MDL number:
MFCD00012966
Beilstein/REAXYS Number:
3912045

Product Name

o-Phenylenediamine dihydrochloride, tablet, 5 mg substrate per tablet

InChI

1S/C6H8N2.2ClH/c7-5-3-1-2-4-6(5)8;;/h1-4H,7-8H2;2*1H

SMILES string

Cl[H].Cl[H].Nc1ccccc1N

InChI key

RIIWUGSYXOBDMC-UHFFFAOYSA-N

form

tablet

mp

258 °C (dec.) (lit.)

storage temp.

2-8°C

Quality Level

300

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Application

o-Phenylenediamine dihydrochloride has been used as a peroxidase substrate in ELISA (enzyme-linked immunosorbent assay).

General description

o-Phenylenediamine dihydrochloride (OPD) is a chromogenic substrate that can be used in enzyme-linked immunosorbent assay (ELISA) procedures as it utilizes horseradish peroxidase conjugates. The substrate produces a soluble end product that is orange-brown and can be read spectrophotometrically at 450 nm. The OPD reaction may be stopped with 3N HCl or 3M H2SO4 and read at 492 nm.

Packaging

150 mg total tablet weight

Preparation Note

Dissolve one tablet in 0.05 M phosphate-citrate buffer, pH 5.0, to the desired concentration (typically an OPD concentration of 0.4 mg/ml is used). Add 40 μl of fresh 30% hydrogen peroxide per 100 ml of substrate buffer solution, immediately prior to use. Tablets are individually packaged in foil packets.

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Warning

Hazard Classifications

Aquatic Chronic 2 - Carc. 2 - Eye Irrit. 2 - Muta. 2 - Skin Sens. 1 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
0000479108
0000479108
0000438609
0000438609
0000391782

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