Effective Oxidizing Reagent: DDQ 84-58-2 Supplied in Large Quantity with Competitive Price

Name: 2,3-dichloro-5,6-dicyano-1,4-benzoquinone

Other name: 2,3-dichloro-5,6-dicyanobenzoquinone； 

                     DDQ; Dichlorodicyano-quinone; Dichlorodicyanobenzoquinone; 

                     Dichlorodicyano-p-benzoquinone;

                     4,5-Dichloro-3,6-dioxocyclohexa-1,4-diene-1,2-dicarbonitrile

CAS: 84-58-2

EINECS: 201-542-2

MF: C8Cl2N2O2

MW: 227.01

MP: 210-215oC

Appearance: yellow to orange powder

Purity: 98%min.

Package: 25g, 100g, 1Kg, bulk package

2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (or DDQ) is the chemical reagent with formula C₆Cl₂(CN)₂O₂. This oxidant is useful for the dehydrogenation of alcohols, phenols, and steroid ketones in organic chemistry. DDQ decomposes in water, but is stable in aqueous mineral acid.

Synthesis of DDQ involves cyanation of chloranil. Thiele and Günther first reported a 6-step preparation in 1906. The substance did not receive interest until its potential as a dehydrogenation agent was discovered. A single-step chlorination from 2,3-dicyanohydroquinone was reported in 1965.

DDQ reacts with water with release of hydrogen cyanide (HCN), which is highly toxic. A low-temperature and weakly acidic environment increases the stability of DDQ.