6,7-dihydrodipyrido[1,2-a:2',1'-c]pyrazinediium dibromide

1,1'-ethylene-2,2'-bipyridyldiylium dibromide

C₁₂H₁₂Br₂N₂

Form Colourless to yellow crystals.

Melting point decomposes above 325℃ (monohydrate).

Density 1.61 (25℃) Solubility In water 700 g/l (20 ℃).

Slightly soluble in alcohols and hydroxylic solvents (25 g/l). Insoluble in non-polar organic solvents (<0.1 g/l).

Oral Acute oral LD50 for rats 408, mice 234 mg/kg.

Skin and eye Acute percutaneous LD50 for rats >793 mg/kg.

Irritating to skin and eyes (rabbits). Absorption through intact human skin is minimal; exposure can cause irritation and a delay in the healing of cuts and wounds. Can cause temporary damage to nails.

Inhalation Extreme exposure to spray droplets may cause nose bleeding.

Pre-harvest desiccation of cotton, flax, alfalfa, clover, lupins, oilseed rape, poppies, soya beans, peas, beans, sunflowers, cereals, maize, rice, sugar beet, and other seed crops; destruction of potato haulms; and stripping of hops. Control of annual broad-leaved weeds in vines, pome fruit, stone fruit, bush fruit, strawberries (also control of runners), citrus fruit, olives, hops, vegetables, ornamental plants and shrubs, and other crops. Control of emergent and submerged aquatic weeds. Weed control on non-crop land. Weed control and tassel inhibition in sugar cane.