Norflurazon

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  • Zorial
  • 4-Chloro-5-(methylamino)-2-(3-(trifluoromethyl)phenyl)-3(2H)-pyridazinone
  • 4-Chloro-5-(methylamino)-2-(a,a,a-trifluoro-m-tolyl)-3(2H)-pyridazinone
  • 4-Chloro-5-methylamino-2-(3-trifluoromethylphenyl)pyridazin-3-one
Formula
C12H9ClF3N3O
Structure
Description
Colorless odorless crystals.
Uses
Norflurazon controls grasses, sedges, and rushes such as crabgrass, foxtail, goosegrass, barnyardgrass, fall panicum, signalgrass, povertygrass, rice cutgrass, needlegrass, smokegrass, spikerush, annual bluegrass, fescues, ripgut grass, ryegrass, wild barley, witchgrass, and many broadleaf weeds, such as prickly sida, common purslane, ragweed, spurred anoda, carpetweed, florida purslane, cheeseweed, chickweed, false dandelion, fiddleneck, filaree, horseweed, london rocket, pineappleweed, puncture vine, redmaids, russian thistle, and shepherdspurse. Suppression or control for nutsedges, bermudagrass, quackgrass, groundsel, annual morning-glory, cocklebur, common lambsquarters, sowthistle, and pigweed. Norflurazon has practical crop tolerance for cotton, cranberries, citrus, apricots, cherries, filberts, nectarines, peaches, plums, prunes, and walnuts.

Registry Numbers and Inventories.
CAS
27314-13-2
EC (EINECS/ELINCS)
248-397-1
RTECS
UR6150000
RTECS class
Agricultural Chemical and Pesticide
Merck
12,6794
Beilstein/Gmelin
757115
Beilstein Reference
5-25-14-00201
EPA OPP
105801
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C12H9ClF3N3O
Formula mass
303.67
Melting point, °C
183 - 185
Vapor pressure, mmHg
2E-8
Solubility in water
Insoluble
pKa/pKb
2.94 (pKa)

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
Stable in aqueous solution @ pH 3-9 ( < 8% loss within 24 hr). Stable upon storage (shelf life (@ 20 C) greater than or equal to 4 yr). Rapidly degraded by sunlight. Stable under alkaline and acid conditions. But susceptible to light.
Incompatibilities
Strong oxidizing agents.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.
Fire potential
Nonflammable

Health.
Exposure effects
The toxicological properties of this material have not been investigated.

First aid
 
   Ingestion
The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation. Activated charcoal activated charcoal binds most toxic agents and can decrease their systemic absorption if administered soon after ingestion. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.