- 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.
- Molecular weight
: 233.10 g/mole
- Water solubility
: 36.4 ppm (25º C)
- Vapor pressure :
6.90 x10-8 mm Hg (25º C)
half-life : 1490 days (pH 5), 240-1330 days (pH 7), 2020 days
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
dissipation half-life : 99.9-134 days
- Henry’s law
constant : 5.10 x 10-10 atm m3 mol-1(25ºC)
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
- 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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