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Chemical Name: 2-(2,4,5-Trichlorophenoxy)propionic acid
Common Names: Fenoprop, Silvex
Chemical Formula: C9H7Cl3O3
Physical Appearance: Off-white crystal or powder
Odor: Mild, phenolic
Recommended Use: Herbicide, generally in brush and broadleaf weed control
Classification: Harmful if swallowed, causes skin and eye irritation, may damage internal organs after prolonged exposure
Routes of Exposure: Inhalation, skin contact, ingestion, eye contact
Health Effects: Irritation to skin and eyes, headaches, dizziness, potential liver and kidney harm under chronic exposure
Environmental Risk: Persistent in soil and water, can disrupt aquatic life
Signal Word: Warning
Main Component: 2-(2,4,5-Trichlorophenoxy)propionic acid (CAS 93-72-1)
Concentration: Over 90% purity for technical grade
Impurities: Dioxin traces possible, especially TCDD
Inhalation: Move to fresh air, seek medical advice if symptoms persist
Skin Contact: Wash with soap and water for at least 15 minutes, remove contaminated clothing
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present, continue rinsing
Ingestion: Rinse mouth, do not induce vomiting, seek medical attention
Most Important Symptoms: Burning, redness, nausea, possible fatigue, rare instances of systemic effects
Suitable Extinguishing Media: Water spray, foam, dry chemical, carbon dioxide
Unsuitable Media: Direct water jet on burning chemical can cause splashing or spread
Protective Equipment: Chemical protective clothing, self-contained breathing apparatus
Hazardous Combustion Products: Hydrogen chloride, phosgene, carbon monoxide, dioxins
Explosion Risk: Decomposition under intense heat releases toxic gases
Personal Precautions: Avoid dust, wear chemical goggles, gloves, and respiratory protection
Environmental Precautions: Prevent entry to sewers, waterways, and soil
Cleanup Methods: Shovel into suitable container, avoid generating dust, ventilate area, cleanse residues with inert absorbent
Waste Disposal: Dispose as hazardous waste following local and national regulations
Handling: Use only in well-ventilated places, avoid inhaling dust or vapors, wash thoroughly after handling
Storage Conditions: Store in cool, dry area in tightly-sealed containers, segregate from food and feed, keep away from moisture and incompatible substances
Incompatible Materials: Strong oxidizers, acids, alkalis
Hygiene Practices: Keep workplace clean, wash hands and face before breaks and after handling
Engineering Controls: Local exhaust ventilation, enclosed processing where feasible
Personal Protective Equipment: Protective gloves, chemical-resistant apron, goggles, face shield, appropriate respirator in cases of high dust or vapor
Workplace Monitoring: Air monitoring for particulate levels, routine surface wipe sampling
Physical State: Solid
Solubility: Low in water, higher in organic solvents
Melting Point: 108–111°C
Vapor Pressure: Negligible at room temperature
Flash Point: Not easily flammable
Odor Threshold: Not established
Chemical Stability: Stable under normal storage conditions
Conditions to Avoid: Extreme heat, prolonged exposure to light
Hazardous Decomposition: Phosgene, hydrogen chloride, carbon monoxide may evolve on burning
Polymerization: Does not occur
Reactivity: Reactive with strong oxidizing agents
Acute Toxicity: LD50 values range between 500–1,500 mg/kg (rat, oral)
Chronic Effects: Liver, kidney, and neurological impacts in high, repeated exposures
Sensitization: Some users may experience allergic reactions
Carcinogenicity: Classified as not classifiable as to human carcinogenicity by IARC; presence of dioxin (TCDD) as impurity increases concern
Reproductive Effects: Data limited, potential risk with chronic exposure to impurities
Persistence: Remains in soil for weeks to months
Bioaccumulation: Moderate; potential to move up the food chain
Aquatic Toxicity: Harmful to aquatic organisms at low concentrations
Mobility in Soil: Moderately mobile, can leach to groundwater in sandy soils
Degradation Products: Dioxins, less chlorinated phenoxy acids
Disposal Methods: Send to licensed hazardous-waste facility
Incineration: High-temperature incineration with scrubbers to control acidic gases
Do Not: Dump in drains or sewers
Packaging Waste: Decontaminate and follow state regulations
UN Number: Could require classification if shipped in bulk
Hazard Class: Closely regulated for land, sea, and air transport based on package size and concentration
Environmental Hazard: Marked as marine pollutant in freight
Packaging: Secure, leak-proof, labeled containers
TSCA Status: Registered for regulatory tracking in the United States
EPA Regulation: Banned for use in the United States since 1985, still tracked due to persistence and stockpiled waste
Globally Harmonized System Classification: Hazard pictograms required for sale and transport
Other Regulations: Subject to restrictions worldwide; relevant country laws need regular checking
