Benefin

  • Balan
  • Balfin
  • Banafine
  • Benalan
  • Benefex
  • Benephin
Formula
C13H16F3N3O4
Structure
Description
Yellow-orange solid.
Uses
Selective pre-emergence herbicide.

Registry Numbers and Inventories.
CAS
1861-40-1
EC (EINECS/ELINCS)
217-465-2
RTECS
XU4550000
RTECS class
Agricultural Chemical and Pesticide
Merck
12,1067
Beilstein/Gmelin
2821329
EPA OPP
84301
Swiss Giftliste 1
G-4071
Austrailia AICS
Listed

Properties.
Formula
C13H16F3N3O4
Formula mass
335.28
Melting point, °C
65 - 67
Boiling point, °C
369
Vapor pressure, mmHg
1.2E-5 (25 C)
Density
1.28 g/cm3 (teC)hniC)al grade) (20 C)
Solubility in water
70 ppm (25 C)
Partition coefficient, pKow
5.29
Heat of vaporization
61.6 kJ/mol

Hazards and Protection.
Storage
Avoid freezing; store above 40F. Do not store near heat or open flame. Emulsifiable concentrates should not be or stored at temperature near flash-point. Should not be frozen.
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
Wear goggles or face shield when handling concn. Coveralls, long-sleeved shirt, impermeable gloves when handling.
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
Shelf life of the emulsifiable concentrates is more than two yr. Decomposed by UV light.
Incompatibilities
Strong oxidizing agents.

Fire.
Flash Point,°C
177
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
Technical material is not flammable. For the emulsifiable concentrates, use ordinary precautions for volatile solvents.

Health.
Poison_Class
4
Exposure effects
CNS depression - administration of lethal doses intragastrically to animals produced flaccidity, adynamia, and tremor. In one mouse study, trifluralin administration was associated with various skeletal anomalies in the offspring.
   Ingestion
RESPIRATORY DEPRESSION - Administration of lethal doses intragastrically to animals resulted in shallow, infrequent, and interrupted respirations within 20 to 25 minutes, with death from respiratory arrest within 3 hours to 2 days.
   Inhalation
Respiratory depression - administration of lethal doses intragastrically to animals resulted in shallow, infrequent, and interrupted respirations within 20 to 25 minutes, with death from respiratory arrest within 3 hours to 2 days.
   Skin
Hyperemia - single applications of 5% trifluralin to the skin was not irritating to rats. Successive daily applications for 5 days produced mild hyperemia lasting 2 days.

First aid
 
   Ingestion
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
   Inhalation
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
   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.