DCMU; Dichlorfenidim; Karmex; 3-(3,4-Dichlorophenyl)-1,1-dimethylurea

3-(3,4-dichlorophenyl)-1,1-dimethylurea

C₉H₁₀Cl₂N₂O

Form Colourless crystals.

Melting point 158-159℃.

Density 1.48.

Solubility In water 36.4 mg/l (25℃). In acetone 53, butyl stearate 1.4, benzene 1.2 (all in g/kg, 27℃). Sparingly soluble in hydrocarbons.

Oral Acute oral LD50 for rats >3000 mg/kg.

Skin and eye Acute percutaneous LD50 for rabbits >2000 mg/kg for 80% WG.

Mild eye irritant (WP formulation) (rabbits); non-irritating to intact skin (50% aqueous paste) (guinea pigs). Non-sensitising to skin (guinea pigs).

Inhalation LC50 (4 h) for rats >5 mg/l.

Total control of weeds and mosses on non-crop areas. Selective control of germinating grass and broad-leaved weeds in many crops, including asparagus, tree fruit, bush fruit, citrus fruit, vines, olives, pineapples, bananas, sugar cane, cotton, peppermint, alfalfa, forage legumes, cereals, maize, sorghum, and perennial grass-seed crops.

Description: White solid with a faint odour, free from visible extraneous matter;

Active Ingredient Content(w/w): ≥97%;

Loss on Drying(w/w): ≤0.5%;

Acetone Insoluble Material(w/w): ≤0.5%