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Substance: Butachlor
Chemical Family: Chloroacetanilide herbicide
Common Applications: Weed control in rice paddies; not for household use
Form: Pale yellow to brown liquid or solid, based on product formulation
Smell: Faint, often mud-like odor
Main Route of Entry: Inhalation, skin contact, accidental ingestion can all bring exposure
Acute Effects: Irritates eyes, skin, and possibly airways; exposure may lead to headache, dizziness, nausea
Chronic Risks: Long-term exposure links to liver and kidney changes in lab animals; data on human carcinogenicity remains limited
Flammability: Not classed as highly flammable, though some formulations include combustible solvents
Main Ingredient: Butachlor, typically over 90% purity depending on the batch
Impurities: Small residuals of other acetanilide compounds may occur
Inert Carriers: Solvents or emulsifiers often mixed in for stability and application
Chemical Formula: C17H26ClNO2
CAS Number: 23184-66-9
Inhalation: Get into fresh air, keep breathing clear, call for help if symptoms don’t ease
Skin Contact: Wash with water and soap, remove any contaminated clothing
Eye Exposure: Rinse eyes under running water for several minutes, seek medical care for lingering pain
Swallowed: Rinse mouth, don’t encourage vomiting, contact poison control or a physician quickly
Suitable Extinguishing Media: Dry chemical, foam, or carbon dioxide
Special Hazards: Decomposition creates irritating fumes such as hydrogen chloride and nitrogen oxides
Personal Protection: Firefighters should use full protective gear and breathing protection to avoid inhaling vapors
Other Considerations: Avoid direct water jets that could spread surface contamination
For Spills: Contain the area, prevent run-off into drains or waterways, absorb with sand or inert materials
Cleanup: Collect residue in labelled containers, clean affected area with detergent and water
Personal Safety: Wear gloves, eye protection, and a mask to limit exposure
Disposal: Dispose through approved hazardous waste processors, never release into the environment
Safe Handling: Handle in well-ventilated areas, minimize open exposure
Physical Protection: Use gloves and goggles, avoid eating or smoking while handling
Storage Conditions: Store away from sunlight, moisture, food, and animal feed, in sealed containers at moderate temperature
Labeling: Maintain clear hazard markings on all storage containers
Engineering Controls: Use local ventilation and closed systems to cut airborne dust or vapor
Personal Equipment: Gloves and chemical splash goggles for handling concentrated products
Respiratory Protection: Respirator masks especially in confined spaces or field mixing
Hygiene: Wash skin and clothing after use, never apply personal care products during handling
Appearance: Oily liquid or crystalline solid, depends on formulation
Smell: Slight, earthy
Boiling Point: Over 300°C
Melting Point: Around 76°C (for pure butachlor)
Water Solubility: Insoluble, but forms emulsions
Density: Ranges near 1.13 g/cm³
Vapor Pressure: Low under ambient conditions
Chemical Stability: Stable under typical storage, degrades quickly in sunlight
Reactive Conditions: Strong alkali or oxidizers may cause breakdown
Decomposition: High heat leads to hazardous gases
Polymerization: Does not tend to self-react or polymerize under standard conditions
Acute Toxicity: Swallowing or inhaling large amounts hurts the digestive and nervous systems
Eye Effects: Causes significant irritation and watering
Long-term Studies: No proven carcinogenic risk for humans, though high doses in animals prompt concern
Sensitization: Occasional reports of skin allergy, usually among workers without protective gear
Absorption: May collect in body tissue with repeated or high-level exposure
Persistence: Lingers in soil up to several months, slow to break down
Mobility: Not the most mobile, yet leaching into groundwater can happen if used in excess or improperly applied
Aquatic Risk: Toxic to fish and nearby stream life even at low levels
Accumulation: Can build up in sediment, affecting bottom-dwelling insects or plants
Biodiversity Impact: Broad-spectrum herbicidal action may impact non-target plants and microorganisms
Leftover Product: Take leftovers to chemical collection or incineration points
Packaging: Rinse triple, puncture, and handle as hazardous, not with domestic waste
Contaminated Tools: Clean thoroughly, don’t dump residue in water or drains
Waste Water: Treat before discharge, strictly avoid direct release to agricultural canals or open ground
Regulations: Follow national guidelines for dangerous goods; use approved containers
Labels: Display hazard warnings clearly for transport and storage
Precautions: Shield from heat, direct sunlight, and mechanical shock
Accident Prevention: Prepare for leaks or spills during loading and unloading, report any incident right away
Global Status: Approved in many rice-growing countries, restricted in some regions due to environmental reason
Labeling Demands: Hazard warnings on all commercial packaging
Pesticide Registrations: Only sold with valid government registration
Worker Protection: Field operators require training and must follow restricted entry intervals after spraying
Community Awareness: Growers given advisories on water protection and drift reduction to limit neighbor and wildlife exposure
