Product Name: 3-Methoxythiophene
Chemical Formula: C5H6OS
Chemical Family: Heterocyclic aromatic compound
Synonyms: 3-Methoxy-1-thiophene
CAS Number: 829-36-5
Recommended Use: Laboratory reagent, organic synthesis intermediate
Manufacturer/Supplier: Lab chemicals distributor information available by request
Emergency Contact: Local Poison Control Center or emergency services
GHS Classification: Flammable liquid (Category 3), Acute toxicity, skin irritation, eye irritation
Pictograms: Flame, Exclamation mark
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor; Harmful in contact with skin; Causes skin and eye irritation; May cause respiratory irritation
Precautionary Statements: Avoid breathing vapors, use only outdoors or in well-ventilated areas, keep away from heat/sparks/open flames/hot surfaces, wear protective gloves/eye protection/face protection, wash thoroughly after handling
Chemical Name: 3-Methoxythiophene
CAS Number: 829-36-5
Concentration: >98% (as provided by reputable laboratory suppliers)
Impurities: May contain typical trace synthesis byproducts not exceeding 2%
Other Components: No other ingredients intentionally present
Inhalation: Remove to fresh air, keep at rest, seek medical attention if breathing becomes difficult
Skin Contact: Remove contaminated clothing, rinse skin with water for at least 15 minutes, get medical attention for persistent symptoms
Eye Contact: Rinse immediately with plenty of water, lifting upper and lower eyelids, continue rinsing for at least 15 minutes, consult physician
Ingestion: Rinse mouth, do not induce vomiting, drink water if person is conscious, seek immediate medical attention
Most Important Symptoms/Effects: Irritation to eyes, skin, respiratory system; dizziness; headache possible from overexposure
Note to Physician: Treat symptomatically; provide supportive measures as needed
Suitable Extinguishing Media: Dry chemical, CO2, alcohol-resistant foam, water spray
Unsuitable Extinguishing Media: Direct water stream might spread fire
Specific Hazards: Vapors can form explosive mixture with air, combustion may produce toxic fumes including carbon monoxide, sulfur oxides
Protective Equipment for Firefighters: Full protective gear and self-contained breathing apparatus recommended
Advice for Firefighters: Evacuate area, prevent runoff from entering drains
Fire/Explosion Hazards: Containers may rupture from pressure buildup during intense heat, vapors heavier than air may travel and ignite at distant source
Personal Precautions: Evacuate unprotected personnel, ventilate area, eliminate ignition sources, use protective clothing, avoid skin and eye contact
Environmental Precautions: Prevent from entering drains or waterways, contain spill if safe to do so
Cleanup Methods: Absorb with inert material (sand, vermiculite), scoop into chemical waste container, clean area with water and detergent
Disposal: Hand over to licensed waste disposal contractor
Emergency Procedures: Seek assistance from trained personnel if spill is significant; notify authorities if product enters environment in large quantity
Handling: Avoid contact with skin, eyes, and clothing, use only in well-ventilated area, ground all equipment
Storage: Store in tightly closed container in cool, dry, well-ventilated location, away from heat, sparks, and open flame, segregate from oxidizers and acids
Hygiene Practices: Wash hands thoroughly after handling, remove contaminated clothing before entering eating areas, prohibit smoking in storage area
Exposure Limits: No established OSHA, ACGIH, or NIOSH workplace exposure limits for 3-Methoxythiophene
Engineering Controls: Use chemical fume hood, provide eyewash stations and emergency showers near handling locations
Respiratory Protection: Use approved respirator if airborne concentrations exceed workplace limits
Eye Protection: Chemical safety goggles or face shield
Skin Protection: Nitrile or neoprene gloves, lab coat or apron
General Protective Measures: Do not eat, drink, or smoke in handling area; use only non-sparking tools
Appearance: Colorless to pale yellow liquid
Odor: Distinct, unpleasant odor
Odor Threshold: Not established
pH: Not applicable (non-aqueous)
Melting Point/Freezing Point: -35°C (approximate)
Boiling Point/Range: 126–128°C
Flash Point: 28°C (closed cup)
Evaporation Rate: Not determined
Flammability: Flammable
Vapor Pressure: 7 mm Hg at 25°C
Vapor Density: Heavier than air
Relative Density: 1.10 g/cm³ at 25°C
Solubility: Slightly soluble in water; miscible with organic solvents such as ethanol and ether
Partition Coefficient (n-octanol/water): Not available
Auto-ignition Temperature: 250°C
Decomposition Temperature: Not available
Viscosity: Not established
Stability: Stable under standard temperature and pressure in closed containers
Hazardous Reactions: Reacts with oxidizing agents, acids
Conditions to Avoid: Heat, sparks, open flames, static discharge, incompatible materials
Incompatible Materials: Strong oxidizers, strong acids
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, sulfur oxides
Polymerization: Not known to occur under normal conditions
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: LD50 (oral, rat): Not well documented; similar compounds suggest moderate toxicity
Skin Corrosion/Irritation: Causes skin irritation, possibly harmful if absorbed
Eye Damage/Irritation: Causes eye irritation
Respiratory Sensitization: May irritate respiratory tract
Chronic Toxicity: No chronic effects established in available studies
Symptoms: Irritation, redness, headache, dizziness
Cancer, Mutagenicity, Reproductive Hazard: Not classified as carcinogenic, teratogenic, or mutagenic based on available data
Ecotoxicity: No measured data for aquatic life, but similar compounds can cause harm to aquatic organisms in high concentrations
Persistence and Degradability: Degradation data limited, compound may persist in environment
Bioaccumulative Potential: No experimental log Kow; estimated risk of bioaccumulation considered low
Mobility in Soil: Expected to have moderate mobility, more soluble in organic solvents than water
Other Adverse Effects: Do not allow significant quantities to reach ground water, waterways, or drains
Disposal Methods: Dispose of as hazardous organic chemical; incinerate in chemical incinerator with afterburner and scrubber
Containers: Completely empty residue containers before disposal, triple rinse, puncture before landfill (if authorized) or dispose as per local regulations
Regulatory Considerations: Disposal must comply with federal, state, and local regulations for hazardous waste
Special Precautions: Avoid release to environment
UN Number: UN 1993
UN Proper Shipping Name: Flammable liquid, n.o.s. (3-Methoxythiophene)
Transport Hazard Class: 3 (Flammable liquids)
Packing Group: III
Marine Pollutant: No (based on available data)
Special Transport Precautions: Secure containers, keep away from sources of ignition, follow local, national transport regulations
US TSCA: Listed
SARA 313: Not subject to reporting requirements
California Proposition 65: Not listed
WHMIS Classification (Canada): B2 (Flammable Liquid), D2B (Toxic), based on available data
European Union: According to REACH regulation, safety assessment recommended before large-scale use
Label Elements: GHS label with proper hazard statements and pictograms
Other Regulations: Users must meet local and national chemical safety codes for workplace chemicals and environmental protection
