Skip to Content
Merck
All Photos(4)

Key Documents

View All Documentation

P9029

Sigma-Aldrich

o-Phenylenediamine

peroxidase substrate, chromogenic, ≥98.0%, powder

Synonym(s):

1,2-Diaminobenzene, 1,2-Phenylenediamine, OPD

Sign Into View Organizational & Contract Pricing
All Photos(4)

About This Item

Empirical Formula (Hill Notation):
C6H8N2
CAS Number:
95-54-5
Molecular Weight:
108.14
Beilstein:
606074
EC Number:
202-430-6
MDL number:
MFCD00007721
UNSPSC Code:
12352204
PubChem Substance ID:
24899004
NACRES:
NA.83

product name

o-Phenylenediamine, Peroxidase substrate, ≥98.0%, powder

vapor density

3.7 (vs air)

vapor pressure

0.01 mmHg ( 25 °C)

Assay

≥98.0%

form

powder

color

white to off-white

bp

256-258 °C

mp

98-102 °C

solubility

ethanol: 50 mg/mL, clear, colorless to faintly yellow

fluorescence

λex 337 nm; λem 417 nm (Pyruvic acid derivative)

storage temp.

2-8°C

SMILES string

Nc1ccccc1N

InChI

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

InChI key

GEYOCULIXLDCMW-UHFFFAOYSA-N

Looking for similar products? Visit Product Comparison Guide

General description

o-Phenylenediamine (OPD) Free Base is a peroxidase substrate suitable for use in enzyme linked immunosorbent assay (ELISA) procedures. The substrate produces a soluble product that is orange-brown in color 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.

Application

o-Phenylenediamine has been used in the microtiter?based assay for hyaluronan quantification. It has also been used in enzyme linked immunosorbent assay (ELISA) for color development.

Caution

May darken in storage.

Signal Word

Danger

Hazard Classifications

Acute Tox. 3 Oral - Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 2 - Eye Irrit. 2 - Muta. 2 - Skin Sens. 1

Storage Class Code

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

WGK

WGK 3

Flash Point(F)

276.8 °F - closed cup

Flash Point(C)

136 °C - closed cup

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

Development of a chicken-derived antivenom against the taipan snake (Oxyuranus scutellatus) venom and comparison with an equine antivenom
Navarro D, et al.
Toxicon, 120(3), 1-8 (2016)
Kelsey E Noll et al.
Cell reports, 31(4), 107587-107587 (2020-04-30)
Host genetic factors play a fundamental role in regulating humoral immunity to viral infection, including influenza A virus (IAV). Here, we utilize the Collaborative Cross (CC), a mouse genetic reference population, to study genetic regulation of variation in antibody response
Bothrops asper envenoming in cattle: Clinical features and management using equine-derived whole IgG antivenom
C.Rodriguez, et al.
The Veterinary Journal, 207(, pages=), 160-163 (2016)
Mehul S Suthar et al.
Cell reports. Medicine, 1(3), 100040-100040 (2020-08-25)
SARS-CoV-2, the virus responsible for COVID-19, is causing a devastating worldwide pandemic, and there is a pressing need to understand the development, specificity, and neutralizing potency of humoral immune responses during acute infection. We report a cross-sectional study of antibody
Expression of hyaluronan synthase 2 or hyaluronidase 1 differentially affect the growth rate of transplantable colon carcinoma cell tumors
Jacobson A, et al.
International Journal of Cancer. Journal International Du Cancer, 102(3), 212-219 (2002)
View All Related Papers

Articles

Colorimetric Phosphatase/Peroxidase Substrate Systems

NBT-BCIP substrate system aids in western blotting and immunohistological staining, producing a blue-purple insoluble end product.

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