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Product Name: Carfentrazone-Ethyl
Chemical Family: Aryl triazolinone herbicide
Chemical Formula: C15H14Cl2F3N3O3
CAS Number: 128639-02-1
Synonyms: Ethyl 2-chloro-3-[2-chloro-4-fluoro-5-(trifluoromethyl)phenyl]-3-oxopropanoate
Physical State: Most commonly encountered as an off-white powder or contained within liquid concentrate formulations
Pictograms: Exclamation mark, Environment
Signal Word: Warning
Hazard Statements: Causes moderate eye irritation, may be harmful if swallowed, toxic to aquatic life with long lasting effects
Precautionary Statements: Prevent release to the environment, wash hands thoroughly after handling, avoid contact with eyes and skin
Routes of Exposure: Inhalation, ingestion, skin contact, eye contact
Active Ingredient: Carfentrazone-Ethyl (68–95% depending on product and formulation)
Inert Ingredients: Often includes surfactants, solvents like xylene or aromatic petroleum distillates, and water (percentages vary and may affect hazard profile)
Inhalation: Move to fresh air. If respiratory symptoms occur, seek medical attention.
Skin Contact: Remove contaminated clothing. Wash thoroughly with soap and water.
Eye Contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do.
Ingestion: Rinse mouth. Drink water if able. Do not induce vomiting unless directed by a medical professional.
Advice for Attending Personnel: Provide this information to medical caregivers.
Suitable Extinguishing Media: Foam, dry chemical powder, or carbon dioxide can stop spread of flames from burning product or packaging.
Protection for Firefighters: Full protective equipment and self-contained breathing apparatus.
Combustion Products: Hydrogen chloride, hydrogen fluoride, nitrogen oxides, and carbon monoxide may form under intense heat.
Special Hazards: Product and containers exposed to fire may rupture or release toxic fumes.
Personal Precautions: Wear protective gloves, goggles, and mask. Ensure good ventilation.
Environmental Precautions: Prevent run-off into drains, sewers, or waterways. Alert proper authorities if large spill enters the environment.
Cleanup Methods: Gather with inert absorbent material like earth or sand. Collect in labelled containers for approved disposal.
Handling: Wear chemical-resistant gloves and splash-proof goggles. Avoid inhaling vapor, dust, or mist.
Storage Conditions: Store in a tightly closed container in a cool, dry, well-ventilated place away from direct sunlight and food or feed.
Incompatibilities: Keep separate from strong acids, bases, and oxidizing agents to avoid dangerous reactions.
Engineering Controls: Local exhaust ventilation is helpful to reduce airborne particles.
Respiratory Protection: Use certified respirators in areas of poor ventilation.
Eye Protection: Wear chemical goggles or a face shield.
Skin Protection: Wear coveralls, impermeable gloves, and boots to avoid direct skin contact.
Appearance: White to off-white crystalline powder in technical grade; may appear as liquid in diluted products.
Odor: Slight aromatic odor
pH: Around 6–8 (1% aqueous solution)
Melting Point: 98–100°C
Water Solubility: Low (~0.11 mg/L at 20°C)
Partition Coefficient (log Kow): ~3.36
Vapor Pressure: Very low (practically nonvolatile under room conditions)
Chemical Stability: Stable under normal storage and handling conditions.
Reactivity: Can react with strong oxidizers. Degrades with prolonged exposure to sunlight and heat.
Hazardous Decomposition Products: May produce harmful gases like hydrogen chloride and nitrogen oxides in fire or hot conditions.
Acute Oral Toxicity: LD50 (rat): 1,750–2,000 mg/kg
Acute Dermal Toxicity: LD50 (rat): >2,000 mg/kg
Acute Inhalation Toxicity: LC50 (rat, 4h): >2.3 mg/L
Irritation: Can cause mild to moderate skin and eye irritation.
Sensitization: Rare reports of skin sensitization or allergy reactions after repeated exposure.
Chronic Effects: No clear evidence of carcinogenicity or major organ toxicity from prolonged low-level exposure in animal studies.
Aquatic Toxicity: Very toxic to aquatic organisms such as fish and algae. LC50 for bluegill sunfish: 0.29 mg/L.
Persistence: Moderate environmental half-life. Degrades more rapidly in anaerobic soils and water.
Bioaccumulation: Low to moderate potential due to physical and chemical properties.
Adverse Effects: Harmful to non-target plants and aquatic ecosystems if misapplied or spilled.
Product Disposal: Should be taken to certified hazardous waste facility. Do not pour down drains, sewers, or into surface waters.
Container Disposal: Triple rinse and offer for recycling or disposal in accordance with local regulation. Avoid reuse of empty containers.
Important Practice: Follow local laws to manage environmental impacts and human hazards.
UN Number: Many Carfentrazone-Ethyl formulations qualify as Environmentally Hazardous Substances by road, rail, and marine transport.
Shipping Designation: Consult local rules; regulatory status can shift based on formulation and concentration considered.
Packing Group: Often regulated as Packing Group III to indicate minor transport severity.
Precautions During Transit: Keep containers upright, tightly closed, and protected from heat or direct sunlight.
Pesticide Status: Registered and controlled under local pesticide registration regulations in many agricultural countries.
Workplace Exposure Limits: No specific OSHA or EU workplace exposure limits for Carfentrazone-Ethyl have been set, though manufacturers recommend general dust and vapor protection.
Environmental Rules: Various waterway and wildlife protection rules apply. Discharge limits and use instructions are set by regulatory bodies such as the US EPA, Canadian PMRA, and EU authorities.
Label Requirements: Application instructions and hazard statements enforced by federal and local laws.
