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Product Name: Clethodim
Chemical Name: 2-[(E)-N-[(E)-3-chloroallyloxyimino]methyl]-5-(2-ethylsulfinylpropyl)-3-hydroxycyclohex-2-en-1-one
CAS Number: 99129-21-2
Synonyms: Select, Arrow, Envoy Plus
Recommended Use: Selective post-emergence herbicide
Manufacturer: Various agrochemical suppliers
Emergency Phone: Refer to local supplier/emergency contacts
Hazard Classification: Acute toxicity (oral), Category 4; Skin sensitization, Category 1; Eye irritation, Category 2A; Specific Target Organ Toxicity (single exposure), Category 3
GHS Label Elements: Warning; Exclamation mark
Hazard Statements: Harmful if swallowed. Causes skin/eye irritation. May cause allergic skin reaction. May cause respiratory irritation.
Precautionary Statements: Avoid breathing mist/vapors. Use only outdoors or in well-ventilated area. Wear protective gloves/eye protection. Wash hands thoroughly after handling.
Routes of Exposure: Inhalation, ingestion, skin, and eye contact
Environmental Hazard: Toxic to aquatic life with long lasting effects
Active Ingredient: Clethodim
Concentration: Typically 24-26% by weight
Other Ingredients: (Proprietary) emulsifiers, carriers, and inert components—balance to 100%
Impurities: Trace levels of byproducts from synthesis process
Formulation Type: Emulsifiable concentrate or soluble liquid, depending on brand
Inhalation: Remove affected person to fresh air. If breathing becomes difficult, administer oxygen and seek medical attention.
Skin Contact: Remove contaminated clothing. Wash skin with soap and plenty of water—do not reuse contaminated clothing until thoroughly washed.
Eye Contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy; continue rinsing and call a physician.
Ingestion: Rinse mouth. Do not induce vomiting. Seek medical attention immediately.
Most Important Symptoms: Irritation of skin, eyes, or mucous membranes. Potential allergic reactions.
Advice for Physician: Treat supportively, monitor for allergic response or systemic toxicity.
Suitable Extinguishing Media: Foam, dry chemical powder, carbon dioxide, or water spray (fine spray preferred).
Hazardous Combustion Products: Oxides of carbon, oxides of sulfur, hydrogen chloride, nitrogen oxides.
Special Protective Equipment: Firefighters should wear full protective clothing and self-contained breathing apparatus. Stay upwind, prevent run-off from entering drains.
Special Hazards: Thermal decomposition producing toxic and corrosive fumes; containers may burst if exposed to heat.
Personal Precautions: Wear protective gloves, boots, goggles, and a suitable respirator to avoid exposure.
Environmental Precautions: Contain spillage; do not allow to enter drains, surface water, or soil.
Methods for Clean-Up: Absorb with sand, earth, or vermiculite; collect and place in containers for disposal. Wash area with water and detergent, collect rinse water for disposal.
Reference to Other Sections: Dispose of contaminated material according to disposal considerations section.
Handling: Wear appropriate personal protective equipment. Avoid breathing vapors or sprays. Avoid contact with eyes, skin, and clothing. Use only in well-ventilated areas. Do not eat, drink, or smoke during use.
Storage: Store in a cool, dry, well-ventilated area away from direct sunlight, food, animal feed, and incompatible materials. Keep tightly closed and in original container.
Incompatible Materials: Strong oxidizing agents, acids, or bases.
Specific End Uses: Refer to product label and technical instructions.
Control Parameters: No occupational exposure limits established; minimize exposure as much as reasonably possible.
Engineering Controls: Provide adequate ventilation or use local exhaust. Use safety showers and eyewash stations nearby.
Personal Protective Equipment: Chemical-resistant gloves, splash-proof goggles or face shield, long-sleeved clothing, rubber boots. Use a respirator if ventilation inadequate.
Hygiene Measures: Wash hands, face, and exposed skin thoroughly after use; remove contaminated clothing immediately.
Appearance: Clear to pale yellow liquid (emulsifiable concentrate)
Odor: Mild, sweet chemical odor
pH: 3 to 7 (1% aqueous solution)
Melting Point/Freezing Point: Not determined in formulated product. Technical: Approx. 105°C
Boiling Point: Not determined in formulated product
Flash Point: Not below 70°C (emulsifiable concentrate)
Solubility: Low water solubility; soluble in organic solvents
Density: Approx. 1.1–1.2 g/cm³
Partition Coefficient (log Kow): 4.1 (Clethodim technical)
Vapor Pressure: Negligible
Chemical Stability: Stable under recommended storage and handling conditions; avoid long-term exposure to high temperatures
Reactivity: Not reactive under normal use; avoid strong oxidizing agents
Hazardous Reactions: None known under intended use
Decomposition Products: Thermal decomposition may yield toxic fumes of carbon, sulfur, oxides of nitrogen, and/or hydrochloric acid
Acute Toxicity: Oral LD50 (rat): 1,630–2,219 mg/kg; Dermal LD50 (rat): >5,000 mg/kg; Inhalation LC50 (rat): >5 mg/L (4 h)
Skin Irritation: Causes mild to moderate irritation
Eye Irritation: Causes moderate irritation
Respiratory Sensitization: May cause respiratory tract irritation; not classified as a sensitizer
Skin Sensitization: May cause allergic skin response
Chronic Effects: Studies show no evidence of carcinogenicity, mutagenicity, or reproductive toxicity in animal tests; some reversible liver effects at high exposures
Other Data: No evidence of neurotoxicity or developmental toxicity based on available studies
Acute Aquatic Toxicity: Toxic to aquatic invertebrates and waterside organisms (e.g., Daphnia magna EC50: 8.2 mg/L; rainbow trout LC50: 27.8 mg/L)
Chronic Aquatic Toxicity: Long-lasting negative effects possible due to slow degradation
Mobility in Soil: Moderate mobility; potential to reach surface waters
Persistence and Degradability: Soil DT50 (half-life): 3 to 7 days (varies by conditions)
Bioaccumulative Potential: Not likely significant based on log Kow and degradation profile
Other Hazards: Hazardous to non-target plants if spray drifts or runoff occurs
Product Disposal: Dispose through licensed hazardous waste contractor. Avoid discharge to drains or watercourses.
Container Disposal: Triple rinse, then puncture or crush and deliver to recycling or disposal facility.
Methods of Disposal: Incineration or landfill at approved waste management site, following local regulatory requirements.
Precautions: Follow safety protocols for handling hazardous residues.
UN Number: 3082
UN Proper Shipping Name: Environmentally hazardous substance, liquid, n.o.s. (contains Clethodim)
Transport Hazard Class(es): 9 (Miscellaneous dangerous substances and articles)
Packing Group: III
Environmental Hazards: Marine pollutant
Special Precautions for User: Prevent package from mechanical damage, secure upright and away from incompatible goods
Transport in Bulk: Follow national/international regulations and vessel requirements
Classification under GHS: Hazardous under GHS; see hazard identification section for details
Inventory Status: Listed on TSCA, EU REACH, Australian AICS, Canadian DSL
Regulatory Restrictions: Subject to pesticide registration and residue limits in food
Other Regulations: SARA Title III (Sections 311/312): Acute health hazard. Not listed as extremely hazardous under Section 302. Not regulated as carcinogen by IARC, NTP, or OSHA.
Label Statements: Always follow pesticide label for agricultural, residential, and professional applications
