Product Name: 2-Oxythiophene
Synonyms: 2-Thienol, Thiophen-2-ol
CAS Number: 2430-99-7
Recommended Use: Intermediate for organic synthesis, laboratory reagent
Manufacturer: Supplier contact information listed on label; typically sourced through chemical supply companies
Emergency Phone: Local emergency number or supplier’s emergency line
GHS Classification: Eye irritation (Category 2A), Skin sensitization (Category 1B), Acute toxicity - oral (Category 4)
Signal Word: Warning
Hazard Statements: Causes serious eye irritation; May cause allergic skin reaction; Harmful if swallowed
Pictograms: Exclamation mark symbol
Precautionary Statements: Avoid breathing dust or vapors, wash skin thoroughly after handling, use protective gear, dispose of contents properly, consult a doctor in case of exposure
Chemical Name: 2-Oxythiophene
Molecular Formula: C4H4OS
Molecular Weight: 100.14 g/mol
Purity: Above 98% (varies by supplier), minor impurities (below 2%) can include structural analogs
Other Ingredients: No significant additives or stabilizers reported
General Advice: Seek immediate medical attention if symptoms develop
Inhalation: Move to fresh air, provide oxygen if breathing is difficult, support breathing as needed
Skin Contact: Remove contaminated clothing, flush skin with plenty of water at least 15 minutes, use soap, seek medical help if redness or irritation persists
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses gently and continue rinsing, consult a doctor promptly
Ingestion: Rinse mouth with water, do not induce vomiting, call a poison center or doctor, monitor for nausea or gastrointestinal upset
Suitable Extinguishing Media: Foam, dry chemical, carbon dioxide, water spray
Specific Hazards: Vapors may be irritating, may form toxic sulfur oxides under fire, combustion generates hazardous gases
Protective Equipment: Full protective suit, self-contained breathing apparatus, avoid inhaling fumes
Advice for Firefighters: Approach flask from upwind, keep containers cool with water, prevent runoff into water sources as residue can cause environmental issues
Personal Precautions: Use gloves and goggles, avoid direct contact, ventilate area, remove ignition sources
Environmental Precautions: Prevent material from reaching drains or waterways, contain spill with sand or inert material
Clean-Up Methods: Collect residue with absorbent material, transfer to chemical waste container, clean area with detergent, do not re-use soiled rags for other purposes
Safe Handling: Use in a well-ventilated space, wear proper personal protective gear, avoid exposure to eyes and skin, do not eat or drink in work zone
Storage Conditions: Store in tight containers, keep in a cool, dry, well-ventilated place, away from incompatible materials and sunlight
Incompatible Materials: Strong oxidizers, acids, alkalis, sources of ignition
Special Requirements: Clearly label containers, secure storage area from unauthorized access, check for leaks regularly
Exposure Limits: No occupational exposure limits established, minimize exposure as a precaution
Engineering Controls: Laboratory fume hood preferred, mechanical ventilation for larger-scale operations
Personal Protection: Nitrile gloves, safety goggles, lab coat, respiratory protection for high concentrations or fumes, change gloves after direct contact
Hygiene Measures: Wash hands after handling, do not touch face, remove contaminated clothing before leaving work area
Appearance: Pale yellow to colorless liquid or crystalline solid
Odor: Slightly aromatic, sulfur-like
Odor Threshold: Not determined
pH: Not measurable in solid state
Melting Point: 17-19 °C
Boiling Point: 191-193 °C
Flash Point: About 74 °C (closed cup)
Evaporation Rate: No data available
Flammability: Can burn if heated
Upper/Lower Flammable Limits: No established data
Vapor Pressure: 0.4 mmHg at 25°C
Solubility: Slightly soluble in water, miscible with most organic solvents
Partition Coefficient: No information
Auto-ignition Temperature: Not established
Decomposition Temperature: No data
Viscosity: No information available
Chemical Stability: Chemically stable under recommended storage and handling conditions, does not react under typical laboratory conditions
Reactivity: No hazardous polymerization, may react with strong oxidizers
Conditions to Avoid: Moisture, heat, open flame, strong sunlight, incompatible chemicals
Hazardous Decomposition Products: Sulfur oxides, carbon monoxide, carbon dioxide
Incompatible Materials: Avoid mixing with acids, oxidizing substances, strong alkalis
Routes of Exposure: Inhalation, ingestion, skin contact, eye contact
Symptoms: May cause skin redness, allergy, eye irritation, discomfort, stomach pain if swallowed
Acute Toxicity Data: Estimated LD50 (oral, rat) 200-500 mg/kg, data points limited
Chronic Effects: May lead to sensitization with repeated exposure, no known human carcinogenicity
Relevant Studies: Data limited due to substance rarity, repeated exposure studies lacking
Other Effects: No mutagenic or reproductive evidence documented in scientific literature
Ecotoxicity: Harmful to aquatic organisms in concentrated form, fish toxicity data unavailable, expected low mobility in soil
Persistence and Degradability: Likely undergoes slow degradation by hydrolysis and photolysis in the environment, sulfur component may impact microorganisms
Bioaccumulation Potential: Not expected to bioaccumulate due to chemical structure and low partition coefficient
Mobility in Soil: Moderate, may leach with water in sandy soils
Other Adverse Effects: Avoid raw releases to the environment, chemical waste must be handled with care
Waste Disposal Methods: Dispose by incineration in approved chemical waste facility, follow local, regional, and national regulations
Waste Code: Check regional chemical waste codes for relevant classification
Packaging Disposal: Triple rinse containers before recycling or disposal, label as hazardous waste
Precautions: Avoid disposal down the drain, never mix with municipal waste, document all steps and keep records
UN Number: Unspecified for small quantities, for bulk refer to latest transport authority guidelines
Transport Hazard Class: 6.1 (Toxic substances, though some authorities may require reclassification)
Packing Group: III (Minor hazard, but still regulated)
Proper Shipping Name: 2-Oxythiophene Solution or Chemical, N.O.S.
Marine Pollutant: No specific designation, still avoid release to waterways
Special Precautions: Secure containers, transport with valid documents, isolation from food and feed, report spills during transit
US Regulations: Not listed specifically on TSCA inventory, workplace controls expected under OSHA and EPA general chemical safety rules
EU Regulations: Subject to REACH registration for bulk, labeling requirements based on hazard classification
Other International: Local chemical control laws may require notification, substances handled in bulk often trigger secondary environmental reviews
Labeling Requirements: GHS-compliant labeling, health hazard pictograms, emergency and supplier contact
Notifiable Quantities: Check local agency for threshold planning quantities
Other Details: Employees and handlers should receive chemical awareness training, maintain access to MSDS at all storage/download locations, keep emergency response contacts posted
