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Template:Chembox ECNumberTemplate:Chembox E number
IUPAC name 6,7-Dihydrodipyrido[1,2-a:2',1'-c]pyrazinediium
Other names 1,1'-Ethylene-2,2'-bipyridyldiylium
3D model (JSmol)
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Molar mass 184.237
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Diquat is a contact herbicide that produces desiccation and defoliation. As an ionic compound, it may have a variety of counterions associated with it. The herbicide is most often used as the dibromide salt, diquat dibromide.[1] Brand names for this formulation include Aquacide, Dextrone, Preeglone, Deiquat, Detrone, Reglone, Reglon, Reglox, Ortho-Diquat and Weedtrine-D.[2]

Diquat is a non-selective herbicide that acts quickly to damage only that parts of the plant to which it is applied.[3] It breaks down quickly upon exposure to soil, leaving little residue.

Diquat dibromide is moderately toxic. It may be fatal to humans if swallowed, inhaled, or absorbed through the skin in sufficient quantities.[3]

Diquat is synthesized from 2,2'-bipyridine.

See also


  1. Merck Index, 11th Edition, 3359.
  2. PubChem listing for diquat dibromide
  3. 3.0 3.1 EXTOXNET, Pesticide Information Project