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Material Safety Data Sheet (MSDS) for Avermectin

Identification

Product Name: Avermectin
Chemical Name: Mixture of avermectin B1a and B1b
Common Names: Abamectin, Agri-Mectin
Manufacturer/Supplier: Contact manufacturer for details
Recommended Uses: Insecticide, acaricide for crops and livestock
Emergency Contact: Refer to local regulations for poison control contacts
CAS Number: 71751-41-2 (B1a), 65195-55-3 (B1b)
UN Number: UN 3077 for environmental hazard
Synonyms: MK-936, Avermectin B1
Address: Information available from supplier

Hazard Identification

GHS Classification: Acute Toxicity (Oral Category 3), Acute Toxicity (Dermal Category 4), Acute Toxicity (Inhalation Category 4), Eye Irritation (Category 2A), Aquatic Hazard (Acute Category 1, Chronic Category 1)
Hazard Pictograms: Skull and crossbones, exclamation mark, dead tree and fish
Signal Word: Danger
Hazard Statements: Toxic if swallowed, harmful in contact with skin or if inhaled, causes serious eye irritation, very toxic to aquatic life with long-lasting effects
Precautionary Statements: Handle with care, wash hands thoroughly after handling, avoid release to the environment, wear protective equipment
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Physical and Chemical Hazards: Combustible solid; may emit toxic fumes under fire conditions
Chronic Health Hazards: Prolonged exposure may affect the nervous system and liver

Composition / Information on Ingredients

Avermectin B1a: 80% or higher (active ingredient)
Avermectin B1b: 20% or less (active ingredient)
Other Ingredients: Solvents, surfactants, carriers (percentage varies by manufacturer)
Impurities: Trace amounts as per technical specifications
Formulation Types: Emulsifiable concentrate (EC), water-dispersible granule (WG), wettable powder (WP)

First Aid Measures

Inhalation: Move person to fresh air, keep comfortable for breathing, seek medical attention if symptoms develop
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water, get medical attention if irritation occurs
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present and easy to do, continue rinsing, seek medical advice if irritation persists
Ingestion: Rinse mouth, do not induce vomiting, get immediate medical help
Symptoms: Nausea, headache, dizziness, muscle tremors, shortness of breath
Advice for Medical Providers: Treat symptomatically, no specific antidote known, monitor respiratory and neurological status

Fire-Fighting Measures

Suitable Extinguishing Media: Dry chemical, carbon dioxide, foam, water spray for cooling tanks and containers
Unsuitable Media: Direct water jet may scatter product and spread fire
Special Protective Equipment: Firefighters wear self-contained breathing apparatus, chemical-resistant suit
Fire or Explosion Hazards: Can decompose at high temperature to emit toxic fumes including carbon monoxide, nitrogen oxides
Advice for Firefighters: Stay upwind, keep exits clear, prevent runoff from entering drains or waterways

Accidental Release Measures

Personal Precautions: Evacuate area, wear protective gear including gloves, mask, goggles, avoid inhaling dust or fumes
Environmental Precautions: Prevent further leakage or spillage if safe to do so, avoid discharge into drains, soil, surface and groundwater
Cleanup Procedures: Collect spillage with non-combustible absorbent material (e.g., sand, soil, vermiculite), dispose of according to regulations, ventilate area, wash spill site
Methods for Containment: Stop leak if possible without risk, use dikes or inert material to contain

Handling and Storage

Safe Handling: Use with adequate ventilation, avoid contact with skin, eyes, and clothing, do not breathe dust, mist, or vapor, keep away from food, drink, animal feed
Personal Hygiene: Wash hands before eating, drinking, smoking, or using toilet, remove contaminated clothing and protective equipment before entering living areas
Storage Conditions: Store in tightly closed original container, in a cool, dry, well-ventilated place, away from children and unauthorized persons, segregate from incompatible substances, keep away from heat, sources of ignition, oxidizing agents
Storage incompatibilities: Strong acids, alkalis, oxidizers
Shelf Life: Refer to manufacturer's specifications

Exposure Controls and Personal Protection

Occupational Exposure Limits: No established OSHA or ACGIH limits; use good occupational hygiene
Engineering Controls: Use local exhaust ventilation, safety showers, eyewash stations
Personal Protective Equipment (PPE): Chemical-resistant gloves, safety goggles or face shield, coveralls or long-sleeved clothing, suitable respiratory protection where ventilation is inadequate
Environmental Controls: Prevent product access to watercourses, soil, drains
Work/Hygiene Practices: Remove contaminated clothing immediately, do not eat, drink, or smoke in work area

Physical and Chemical Properties

Appearance: White to yellowish crystalline powder (pure active), may vary depending on formulation
Odor: Mild, faint characteristic odor
pH: (1% solution): typically 4.5–7.0
Boiling Point: Decomposes before boiling
Melting Point: 155–157°C for technical grade
Flash Point: Not determined (combustible solid or liquid depending on formulation)
Solubility: Low solubility in water, soluble in organic solvents (methanol, acetone, chloroform)
Density: 1.2–1.3 g/cm³ (approximate)
Vapor Pressure: Very low at 25°C
Partition Coefficient (log Kow): 3.0–4.1
Stability in Water: Degrades slowly, faster at extreme pH
Explosion Limits: Not explosive under normal use

Stability and Reactivity

Chemical Stability: Stable under normal storage and handling conditions
Conditions to Avoid: High temperatures, direct sunlight, humidity, sources of ignition
Incompatible Materials: Strong oxidizing agents, acids, bases
Decomposition Products: May include hazardous fumes such as carbon dioxide, carbon monoxide, various organic compounds
Polymerization: Will not occur under normal circumstances

Toxicological Information

Likely Routes of Exposure: Inhalation, ingestion, dermal, ocular
Acute Toxicity: Oral LD50 (rat): 10–30 mg/kg; Dermal LD50 (rabbit): > 2000 mg/kg; Inhalation LC50 (rat, 4h): 1.7 mg/L (technical)
Irritation: Causes moderate eye and skin irritation
Sensitization: Not classified as a sensitizer
Chronic Effects: Neurotoxicity, possible reproductive effects at high, prolonged doses
Carcinogenicity: Not listed by IARC, NTP, OSHA as carcinogenic
Mutagenicity: Not classified as mutagenic based on available studies
Other Effects: At high exposures, may cause clonic convulsions, tremors

Ecological Information

Aquatic Toxicity: Very toxic to aquatic invertebrates (Daphnia LC50: < 0.001 ppm), fish (Rainbow trout LC50: 0.0036 ppm, 96hr)
Bioaccumulative Potential: Significant; log Kow suggests bioaccumulation in aquatic organisms
Persistence: Moderately persistent in soil (half-life: 1–4 weeks), rapidly degraded by sunlight and microbes
Mobility in Soil: Low to moderate; binds strongly to soil, low risk of groundwater contamination
Ecotoxicity to Other Organisms: Toxic to bees and some birds
Other Ecological Advice: Do not allow runoff to enter waterways, wetlands, drainage ditches

Disposal Considerations

Waste Disposal Methods: Dispose of via licensed hazardous waste contractor; follow local, state, and national regulations
Container Disposal: Triple rinse, puncture, and dispose of containers according to regulatory requirements
Environmental Precautions: Prevent spills from reaching water sources, avoid contaminating soil, water, and sewers
Special Instructions: Do not use emptied containers for any other purpose, never discharge into the environment

Transport Information

UN Number: UN 3077
Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (Avermectin)
Transport Hazard Class: 9 (Miscellaneous dangerous substances)
Packing Group: III
Marine Pollutant: Yes
Labels Required: Miscellaneous dangerous good, marine pollutant
Special Precautions for Transport: Keep away from food, animal feed; required placarding as per regulations, avoid spills during transport

Regulatory Information

OSHA: This product is hazardous as defined in 29 CFR 1910.1200
SARA Title III: Section 313 not listed, but check local reporting thresholds
FIFRA: Registered for use as a pesticide in the US; refer to label for use restrictions
TSCA: Avermectin is not listed on the TSCA Inventory (pesticides exempt)
EU Regulation: Classed as hazardous; REACH compliance needed for components
WHMIS Classification (Canada): D2B (Toxic, Irritant), D1B (Toxic for acute effects)
Other International Regulations: Subject to country-specific pesticide and chemical safety laws; hazardous to aquatic environment under UN GHS