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Product Name: S-Methoprene
Chemical Name: Isopropyl (2E, 4E, 7S)-11-methoxy-3,7,11-trimethyl-2,4-dodecadienoate
CAS Number: 65733-16-6
Synonyms: Altosid, Diacil, Pharorid, Apex, Hamadri
Recommended Use: Insect growth regulator for pests including mosquitoes and fleas
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Classification: Not regarded as hazardous under GHS classification. Limited eye and skin mild irritancy.
Primary Hazards: May cause eye and skin irritation, inhalation may cause mild respiratory discomfort, ingestion has low acute toxicity, not a sensitizer.
Label Elements: No mandatory GHS pictogram; precautionary statements recommend avoiding prolonged contact.
Specific Hazards: Avoid release to environment in large amounts, as aquatic toxicity data suggest limited effects.
Routes of Exposure: Skin, eyes, respiratory system, ingestion.
Medical Conditions Aggravated By Exposure: None documented from common sources.
Main Ingredient: S-Methoprene
Content: Typically 90% or higher (technical grade)
CAS Number: 65733-16-6
Other Ingredients: Inert carriers, emulsifiers, stabilizers, proprietary substances if formulated for end-use
Impurities: Not considered hazardous at trace levels in standard commercial formulas
Eye Contact: Flush liberally with water for at least 15 minutes, seek medical attention if irritation persists.
Skin Contact: Wash thoroughly with soap and water, remove contaminated clothing, medical attention if persistent redness or irritation appears.
Inhalation: Move person to fresh air. If symptoms develop, get immediate medical attention.
Ingestion: Rinse mouth, do not induce vomiting unless directed by professional medical staff. Seek prompt medical advice.
Most Important Symptoms: Mild eye or skin irritation, rarely nausea or headache.
Advice for Physicians: Symptomatic treatment only, no specific antidote.
Suitable Extinguishing Media: Water spray, dry chemical, foam, carbon dioxide.
Unsuitable Extinguishing Media: Avoid straight water streams on pool fires.
Specific Hazards: Product decomposes at high temperature producing carbon oxides and possibly irritating fumes.
Fire Fighting Instructions: Wear full protective clothing and self-contained breathing apparatus.
Special Protective Equipment: Firefighters require chemical-resistant gloves and boots to prevent contact.
Hazardous Combustion Products: Carbon monoxide, carbon dioxide, smoke, and possible minor fumes of methacrylates.
Personal Precautions: Wear suitable protective clothing and gloves, avoid inhalation or skin contact.
Environmental Precautions: Prevent entry of large spills into waterways and drains, collect spillages with absorbent materials like sand or earth.
Cleanup Methods: Spread absorbent over spillage, scoop into suitable, labeled containers for proper disposal.
Decontamination: Wash spill area with soap and water if appropriate, ventilate enclosed spaces.
Reference to Other Sections: Refer to Exposure Controls/Personal Protection for further handling guidance.
Safe Handling: Avoid prolonged or repeated contact with skin, eyes, or clothing, work in well-ventilated conditions, no eating, drinking, or smoking in use area.
Storage Conditions: Store in tightly closed, labeled containers in a cool, dry, well-ventilated space away from incompatible materials.
Storage Temperature: Keep away from heat, sparks, or open flame, protect from direct sunlight.
Incompatibilities: Strong oxidizing agents, strong acids or bases can degrade product.
Specific End Use(s): For professional or industrial use in pest management.
Occupational Exposure Limits: No established ACGIH or OSHA exposure limits for S-Methoprene
Engineering Controls: Work site ventilation or fume extraction for bulk handling.
Personal Protective Equipment: Long-sleeved clothing, chemical resistant gloves (nitrile or neoprene), goggles or safety glasses, NIOSH-approved respirators if mist/vapor present.
Hygiene Measures: Wash hands thoroughly with soap and water after handling, launder contaminated clothing before reuse.
Environmental Exposure Controls: Prevent runoff to water bodies, use containment measures for large-scale application.
Appearance: Light yellow to straw-colored liquid (pure substance), can be formulated as granules or emulsifiable concentrate.
Odor: Mild ester-like scent.
Odor Threshold: Not established.
pH Value: Neutral as supplied.
Melting Point/Freezing Point: Melting Point < -10°C
Boiling Point/Range: Decomposes above 200°C
Flash Point: Above 93°C (closed cup)
Evaporation Rate: Not defined for this product
Flammability: Not readily flammable
Upper/Lower Flammable Limits: Not specifically tested
Vapor Pressure: Very low at 20°C
Solubility: Insoluble in water; soluble in organic solvents
Partition Coefficient (log Kow): 5.5 (octanol/water, indicates strong lipid solubility)
Viscosity: 81.7 cPs at 25°C
Density: 0.87–0.88 g/cm3 at 20°C
Decomposition Temperature: >200°C
Chemical Stability: Stable under typical storage and handling conditions.
Reactivity: Not reactive under standard industrial use.
Conditions to Avoid: Very high temperatures, direct sunlight, open flames.
Materials to Avoid: Strong acids, bases, and oxidizing agents.
Hazardous Decomposition Products: Carbon oxides and low molecular organics at decomposition.
Polymerization: Does not self-polymerize.
Acute Toxicity: Oral LD50 (rat) > 5,000 mg/kg (very low toxicity), Dermal LD50 (rabbit) > 2,000 mg/kg.
Inhalation: LC50 (rat, 4 h) > 2.9 mg/L (technical).
Skin Corrosion/Irritation: Slightly irritating, not corrosive.
Eye Damage/Irritation: Slightly irritating, not damaging.
Skin Sensitization: Not a sensitizer in standard tests.
Chronic/Long-term Effects: No evidence of mutagenicity, carcinogenicity, reproductive or developmental toxicity from animal studies.
Target Organ Effects: No organ specificity documented.
Further Information: Used in pest control for over 40 years with low toxicity to mammals confirmed in published literature.
Ecotoxicity: Low toxicity to fish (LC50 > 370 ppb for rainbow trout), not toxic to birds, moderate effects on aquatic invertebrates, highly specific for juvenile insect developmental interruption.
Persistence and Degradability: Degrades in the environment via hydrolysis and photolysis, half-life in soil 30–40 days.
Bioaccumulative Potential: Moderate potential for bioconcentration in aquatic organisms (log Kow 5.5), but rapid metabolism in mammals.
Mobility in Soil: Low, tends to bind to organic matter.
Other Adverse Effects: Does not harm beneficial insects, pollinators, or earthworms under labeled uses.
Waste Treatment Methods: Collect waste product and contaminated materials in clearly labeled, secure containers.
Disposal of Product: In accordance with local, regional, and national regulations for pesticide waste — typically in a hazardous waste facility.
Container Disposal: Triple rinse, puncture, and recycle or dispose of containers as required by law.
Special Precautions: Do not allow to enter drains, surface, or groundwater in uncontrolled amounts.
Recommended Disposal Practices: Contact certified waste contractor for large volumes.
UN Number: Not regulated as dangerous goods by road, sea, or air transport.
Proper Shipping Name: S-Methoprene products
Transport Hazard Class: Not subject to hazardous class marking.
Packing Group: Not assigned.
Environmental Hazards: Not classified as marine pollutant.
Special Precautions for Transport: Store upright, keep containers secure, do not transport with food or feed.
TSCA Status: Listed (United States Toxic Substances Control Act)
FIFRA: Registered active ingredient for use in pest control (EPA Reg. No. varies by product)
REACH (EU): Not registered as an individual substance; uses covered by biocidal product authorizations
OSHA: Not classified as hazardous under OSHA Hazard Communication Standard.
Risk Phrases: No mandatory risk phrases. Safe if handled using recommended precautions.
Other Registrations: Compliant with labeling, handling, and disposal standards of major regulatory bodies globally.
