Carfentrazone ethyl

  • a,2-Dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluoro-, ethyl ester
  • Ethyl (RS)-2-chloro-3-[2-chloro-5-(4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl)-4-fluorophenyl]propionate
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Formula
C15H14Cl2F3N3O3
Structure
Description
Light to dark brown solid with a slight musty odor.
Uses
Post-emergent herbicide.

Registry Numbers and Inventories.
CAS
128639-02-1
EC Index Number
607-309-00-5
R: 50/53
S: 60 61
UN (DOT)
3077
Merck
12,10493
EPA OPP
128712
Swiss Giftliste 1
G-205824
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
C15H14Cl2F3N3O3
Formula mass
412.2
Melting point, °C
-22.1
Boiling point, °C
352.5
Vapor pressure, mmHg
2.1E-8 (25 C)
Density
1.52 g/cm3
Solubility in water
Insoluble
Partition coefficient, pKow
3.45
Heat of vaporization
71.30 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated place. Do not use or store near heat, open flame or hot surfaces. Store in original containers only.
Protection
For dust exposure, wear chemical protective goggles or a face shield. Wear chemical protective gloves made of materials such as nitrile or neoprene. Protective clothing.
Respirators
For dust exposures wear, as a minimum, a properly fitted half-face or full-face air-purifying respirator, which is approved for pesticides (U.S. NIOSH/MSHA, EU CEN or comparable certification organization). Respirator use and selection must be based on airborne concentrations.
Small spills/leaks
Use a wet sweeping compound or water to prevent the formation of dust. If water is used, prevent runoff or dispersion of excess liquid by diking and absorbing with a non-combustible absorbent such as clay, sand or soil. Vacuum, shovel or pump all waste material, including absorbent, into a drum and label contents for disposal. To clean and neutralize spill area, tools and equipment, wash with a suitable solution of caustic or soda ash, and an appropriate alcohol (i.e., methanol, ethanol or isopropanol). Follow this by washing with a strong soap and water solution. Absorb, as above, any excess liquid and add to the drums of waste already collected.
Stability
Stable at normal temperatures and pressures.
Decomposition
Carbon monoxide, carbon dioxide, nitrogen oxides, hydrogen chloride, and hydrogen fluoride.

Fire.
Flash Point,°C
228
Fire fighting
Foam, CO2 or dry chemical. Soft stream water fog only if necessary. Isolate fire area. Evacuate downwind. Wear full protective clothing and self-contained breathing apparatus. Do not breathe smoke, gases or vapors generated.
Fire potential
Slightly combustible. May support combustion at elevated temperatures.
Hazards
Finely dispersed particles can form explosive mixtures in air.
Combustion products
Thermal decomposition and burning may form toxic by-products.

Health.
Exposure effects
Effects from overexposure may result from inhaling or coming into contact with the skin. Symptoms of overexposure include shaking and tearing of the eyes.
   Skin
Moderately irritating.

First aid
 
   Ingestion
Drink 1 or 2 glasses of water. Never give anything by mouth to an unconscious person. If any discomfort persists, obtain medical attention.
   Inhalation
Remove to fresh air. If breathing difficulty or discomfort occurs and persists, obtain medical attention.
   Skin
Remove contaminated clothing and thoroughly wash with soap and water. If irritation occurs and persists, contact a medical doctor.
   Eyes
Flush with water for at least 15 minutes. If irritation occurs and persists, obtain medical attention.

Transport.
UN number
3077
Response guide
Hazard class
9
Packing Group
III