Product Identification

Product Name

Fomesafen

Synonyms

5(2-Chloro-a,a,a-trifluoro-p-tolyloxy)-n-mesyl-2-nitrobenzamide
5-[2-Chloro-4-(trifluoromethyl)phenoxy]-N-methylsulfonyl-2-nitrobenzamide
Flex
N-Methanesulfonyl-5-[(2-chloro-a,a,a-trifluoro-4-tolyl)oxy]-2-nitrobenzamide

CAS

72178-02-0

Formula

C15H10ClF3N2O6S

Molecular Weight

438.78

EINECS

276-439-9

RTECS

CV2475000

RTECS Class

Agricultural Chemical and Pesticide

Beilstein/Gmelin

8165046

EC Index Number

604-040-00-5

EC Class

Harmful

Physical and Chemical Properties

Appearance

White crystalline solid.

Solubility in water

50 mg/L at 25 C and pH 7

Melting Point

220-221

Density

1.28 g/cm3 (20 C)

pKa/pKb

2.7 (pKa)

Partition Coefficient

2.9 at pH 1

Usage

Herbicide. Selective annual broadleaf weed killer and has activity on some grass and sedge species.

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. 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.

Handling and Storage

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.

Exposure Controls/Personal Protection

Personal 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.

Exposure Effects

The toxicological properties of this material have not been investigated.

Fire Fighting Measures

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.

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

Stable in storage for at least 6 months at 50 C.

Incompatibilities

Strong oxidizing agents.