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Information @ a Glance

  • The chemical (IUPAC) name for diuron is N-(3, 4-dichlorophenyl)-N, N-dimethylurea (C9H10Cl2N2O). In California, registered products containing the active ingredient diuron include Direx, Karmex, and Krovar (in combination with bromacil), among others.
  • Diuron is often used in combination with other herbicides such as bromacil, hexazinone, paraquat, thiadiazuron, imazapyr, monosodium, sodium chlorate, sodium metaborate, and copper sulfate.

Physical-Chemical Properties

  • Molecular weight : 233.10 g/mole
  • Water solubility : 36.4 ppm (25º C)
  • Vapor pressure : 6.90 x10-8 mm Hg (25º C)
  • Hydrolysis half-life : 1490 days (pH 5), 240-1330 days (pH 7), 2020 days (pH 9)
  • Aqueous photolysis half-life : 43.1–2180 days (pH 7 at 25º C)
  • Aerobic soil degradation : 372 days
  • Anaerobic soil degradation : 995 days
  • Soil photolysis half-life : 173 days
  • Field dissipation half-life : 99.9-134 days
  • Henry’s law constant : 5.10 x 10-10 atm m3 mol-1(25ºC)
  • Octanol-water coefficient Kow : 648 - 747
  • Soil adsorption coefficient Koc : 418-560

First Aid Measures

  • Inhalation: Remove from exposure area to fresh air immediately. If breathing has stopped, perform mechanical artificial respiration. Keep person warm and at rest. Treat symptomatically and supportively. Obtain medical attention if necessary.
  • Skin contact: Remove contaminated clothing, shoes and leather goods. Gently wipe off excess chemical. Wash skin gently and thoroughly with water and non-abrasive soap. Seek medical advice if necessary. The product is not considered to be a skin sensitizer, but persons who become sensitized may require specialized medical management with anti-inflammatory agents.
  • Eye contact: Immediately flush the eyes with gently flowing lukewarm water or saline solution for 20 minutes, occasionally lifting the upper and lower lids. Obtain medical attention if necessary.

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