OPD Tablets for colorimetric detection of Horseradish Peroxidase activity in ELISAs.

Ortho-Phenylenediamine (OPD) is a water soluble chromogenic substrate that produces a yellow color during the enzymatic degradation of hydrogen peroxide by horseradish peroxidase (HRP) with an absorption maximum at 450 nm. After addition of sulfuric acid a very stable orangeend solution is obtained that can be read at 490 nm.

Kem-En-Tec Diagnostics offers:


Catalog number Tablet type Tablet size Package size
4260 Standard OPD tablet 10 mg 100 tablets/vial
4090 Standard OPD tablets 2 mg 250 tablets/vial
4110 Fizzing OPD tablets 2 mg 250 tablets/vial