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Product Name: Methyl N-(1-N-Butylcarbamoyl-2-Benzimidazolyl)Carbamate
Synonyms: Benomyl
Chemical Formula: C14H18N4O3
CAS Number: 17804-35-2
Use: Systemic fungicide for plant disease control
Supplier: Details available in manufacturer documentation
Emergency Contact: National Poison Control Center: 1-800-222-1222
Manufacturer Contact: Provided on shipment and packaging
Hazard Class: Acute Toxicity, Eye Irritation, Sensitization
Label Elements: Exclamation mark symbol for irritant hazards
Health Hazards: May cause skin and eye irritation, allergic reactions possible with prolonged skin contact, dust may trigger respiratory irritation.
Environmental Hazard: Harmful to aquatic organisms, risk of long-term adverse effects in aquatic environment.
Physical Hazards: Not classified as flammable, does not explode under normal conditions.
Chemical Identity: Methyl N-(1-N-Butylcarbamoyl-2-Benzimidazolyl)Carbamate
% Weight: ≥95%
Impurities: Trace levels of carbendazim and other benzimidazole derivatives
Other Components: Processing aids below 1%
Molecular Weight: 290.32 g/mol
Inhalation: Move affected person to fresh air, avoid breathing dust during rescue, provide oxygen if breathing is difficult, seek medical attention for persistent symptoms.
Skin Contact: Remove contaminated clothing, rinse skin with water and mild soap for at least 15 minutes, call for medical advice if irritation or rash appears.
Eye Contact: Rinse cautiously with water for minutes keeping eyelids open, remove contact lenses if present and easy to do, seek medical help for lasting irritation.
Ingestion: Rinse mouth with water, do not induce vomiting, seek immediate medical attention, provide physician with product label.
Extinguishing Media: Foam, dry chemical powder, or carbon dioxide, use water spray for cooling containers exposed to fire.
Hazardous Decomposition Products: Nitrogen oxides, carbon monoxide, carbon dioxide, toxic fumes possible on thermal decomposition.
Protective Equipment: Full protective suit, self-contained breathing apparatus for fire fighters
Special Procedures: Cut-off sources of ignition, burn residues under controlled conditions, prevent run-off from contaminating water sources.
Personal Precautions: Avoid inhaling dust, use protective gloves and goggles, ventilate area, evacuate unprotected persons.
Spill Cleanup Methods: Scoop spilled product into labeled containers for disposal, wipe remaining residue with damp absorbent materials, avoid use of dry sweeping which may raise dust.
Environmental Precautions: Prevent entry to waterways, drains, or soil, inform environmental authorities in case of large spills.
Decontamination: Wash tools and contaminated surfaces thoroughly, dispose of contaminated cleaning materials in accordance with local regulations.
Handling: Use in well-ventilated areas, handle with chemical-resistant gloves and face protection, do not eat, drink, or smoke during use, avoid dust formation.
Storage: Store in sealed, original containers in a cool, dry, ventilated and locked facility, segregate from foodstuffs, acids and oxidizing agents, keep out of reach of children and unauthorized personnel.
Compatibility: Do not store with oxidizers or strong acids, avoid contact with direct sunlight and moisture.
General Hygiene: Always wash hands before breaks and after handling, launder work clothes regularly.
Exposure Limits: No specific occupational exposure limits established, minimize exposure by engineering controls.
Engineering Controls: Local exhaust ventilation or closed handling systems reduce airborne exposure.
Personal Protection: Wear impervious gloves (nitrile or neoprene), chemical safety goggles, long sleeves and pants, use suitable respiratory protection for dusty conditions.
Hygiene Measures: No food, drink, or smoking in work area, remove contaminated clothing before leaving work zone, wash skin and face thoroughly after handling.
Appearance: White or off-white crystalline powder
Odor: Faint, characteristic
pH: Slightly acidic (4.9 - 6.0 in 1% aqueous suspension)
Melting Point: 140–150°C
Boiling Point: Decomposes before boiling
Solubility: Sparingly soluble in water, more soluble in organic solvents like acetone and dimethyl sulfoxide
Vapor Pressure: Negligible at ambient temperature
Density: 1.33 g/cm³
Partition Coefficient (Log Kow): 1.57
Chemical Stability: Stable under standard storage and handling, unstable under prolonged heat or direct sunlight
Hazardous Polymerization: No hazardous polymerization anticipated
Incompatibility: Strong acids, oxidizers, strong bases disrupt molecular structure
Hazardous Decomposition: Releases toxic fumes of CO, CO₂, and NOx at high temperatures
Conditions to Avoid: Moisture, excessive heat, sparks, and open flames
Acute Toxicity: Oral LD50 (rat): 1500–1800 mg/kg; Dermal LD50 (rabbit): >10,000 mg/kg
Skin and Eye Effects: May cause mild to moderate irritation, prolonged contact can trigger dermatitis or allergic responses
Inhalation: Irritation of nose, throat, and lungs possible at high concentrations
Chronic Effects: Repeated overexposure leads to sensitization, possible damage to liver with very high doses
Carcinogenicity: Not listed as carcinogen by IARC, NTP, or OSHA, but concerns about metabolites such as carbendazim have been studied for reproductive toxicity
Other Effects: No known mutagenic or teratogenic effects in standard animal studies
Ecotoxicity: Harmful to aquatic invertebrates and non-target plant life, moderate toxicity to fish (LC50 for rainbow trout: 1.5 mg/L)
Mobility: Moderately mobile in soil, breakdown by hydrolysis and microbial processes
Persistence and Degradability: Degrades slowly in environment, half-life in soil ranges from weeks to several months based on conditions
Bioaccumulation: Low bioaccumulation potential (log Kow 1.57)
Aquatic Toxicity: Avoid contamination of surface waters and ditches, persistent residues can disrupt aquatic ecosystems if not managed
Disposal Methods: Waste product must be collected for chemical incineration in accordance with environmental regulations, containers and packaging require triple-rinsing before recycling or disposal
Environmental Precautions: Prevent from reaching drains, surface, or groundwaters
Special Instructions: Consult local, regional, and national regulations regarding disposal of pesticides and their containers
Disposal of Contaminated Packaging: Destroy by incineration at approved facility, avoid reuse of empty containers
UN Number: 3077
Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (contains benzimidazole carbamate derivative)
Transport Hazard Class: 9 (Miscellaneous dangerous substances and articles)
Packing Group: III
Labeling Requirements: Environmentally hazardous substance marking required
Special Precautions: Shield containers from physical damage, avoid moisture ingress
Regulatory Transport Codes: Subject to requirements of ADR, IATA, IMDG for hazardous goods
Global Inventories: Listed on U.S. TSCA, EU REACH, Canadian DSL, Australian AICS, Japanese ENCS
FIFRA Status: Registered pesticide in several countries, restricted use in others
Signal Words: Warning (Irritant)
SARA Title III: Not listed under Section 313
Other Regulations: Worker Protection Standard (WPS) applies for agricultural use, label and use instructions must match local law
Risk Phrases: R36/37/38: Irritating to eyes, respiratory system, and skin; R50: Very toxic to aquatic organisms
Safety Phrases: S2: Keep out of reach of children; S24/25: Avoid contact with skin and eyes; S61: Avoid release to the environment
