Product Identification

Product Name

Benfluralin

Synonyms

Balan
Balfin
Banafine
Benalan
Benefex
N-Butyl-N-ethyl-2,6-dinitro-4-(trifluoromethyl)aniline

CAS

1861-40-1

Formula

C13H16F3N3O4

Molecular Weight

335.28

EINECS

217-465-2

RTECS

XU4550000

RTECS Class

Agricultural Chemical and Pesticide

Merck

12,1067

Beilstein/Gmelin

2821329

Physical and Chemical Properties

Appearance

Yellow-orange solid.

Solubility in water

70 ppm (25 C)

Melting Point

65 - 67

Boiling Point

369

Vapor Pressure

1.2E-5 (25 C)

Density

1.28 g/cm3 (teC)hniC)al grade) (20 C)

Partition Coefficient

5.29

Heat Of Vaporization

61.6 kJ/mol

Usage

Selective pre-emergence herbicide.

First Aid Measures

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.

Handling and Storage

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.

Hazards Identification

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.

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.

Exposure Controls/Personal Protection

Personal 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.

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.

Poison Class

4

Fire Fighting Measures

Flash Point

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.

Accidental Release Measures

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 and Reactivity

Stability

Shelf life of the emulsifiable concentrates is more than two yr. Decomposed by UV light.

Incompatibilities

Strong oxidizing agents.