Formesafen

  • 5(2-Chloro-a,a,a-trifluoro-p-tolyloxy)-n-mesyl-2-nitrobenzamide
  • N-Methanesulfonyl-5-[(2-chloro-a,a,a-trifluoro-4-tolyl)oxy]-2-nitrobenzamide
  • Flex
Formula
C15H10ClF3N2O6S
Structure
Description
White crystalline solid.
Uses
Herbicide. Selective annual broadleaf weed killer and has activity on some grass and sedge species.

Registry Numbers and Inventories.
CAS
72178-02-0
EC (EINECS/ELINCS)
276-439-9
EC Index Number
604-040-00-5
EC Class
Harmful
RTECS
CV2475000
RTECS class
Agricultural Chemical and Pesticide
Beilstein/Gmelin
8165046

Properties.
Formula
C15H10ClF3N2O6S
Formula mass
438.78
Melting point, °C
220-221
Density
1.28 g/cm3 (20 C)
Solubility in water
50 mg/L at 25 C and pH 7
pKa/pKb
2.7 (pKa)
Partition coefficient, pKow
2.9 at pH 1

Hazards and Protection.
Storage
Stable in storage for at least 6 months at 50C. Decomposed by light. Resistant to hydrolysis under both acidic and alkaline conditions. Forms water-soluble salts.
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 storage for at least 6 months at 50 C.
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.

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

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. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
   Eyes
If symptoms develop, immediately move individual away from exposure and into fresh air. Flush eyes gently with water for at least 15 minutes while holding eyelids apart; seek immediate medical attention.

Transport.