Product Name: Thiophene-2-Carbaldehyde
CAS Number: 98-03-3
Synonyms: 2-Thiophenecarboxaldehyde, 2-Formylthiophene
Molecular Formula: C5H4OS
Molecular Weight: 112.15 g/mol
Use: Laboratory research, organic synthesis, fragrance industry
Supplier: Reliable chemical distributors and specialty chemical providers
Contact Information: Phone, email, and emergency telephone number available through supplier documentation
GHS Classification: Flammable liquid (Category 3), Acute toxicity oral (Category 4), Skin irritation (Category 2), Eye irritation (Category 2A)
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor, harmful if swallowed, causes skin and eye irritation
Pictograms: Flame, exclamation mark
Precautionary Statements: Avoid breathing vapors, wash thoroughly after handling, keep container tightly closed, keep away from heat and open flames, use personal protective equipment
Substance: Thiophene-2-Carbaldehyde
Chemical Identity: C5H4OS
Percent: ≥ 98%
Impurities: Minor organic solvent traces, less than 2%
Inhalation: Move affected person to fresh air, keep at rest, call for medical attention if symptoms develop
Skin Contact: Remove contaminated clothing, rinse skin with plenty of water for at least fifteen minutes, seek medical advice for irritation or discomfort
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses, do not rub eyes, get medical help if irritation persists
Ingestion: Rinse mouth, do not induce vomiting, call poison control or a physician immediately
Symptoms: May include drowsiness, headache, skin redness, eye pain or watering
Suitable Extinguishing Media: Carbon dioxide, dry chemical powder, alcohol-resistant foam
Specific Hazards: Combustible, gives off toxic fumes of sulfur oxides and carbon oxides upon combustion
Protective Equipment: Wear self-contained breathing apparatus and protective suit
Special Procedures: Cool fire-exposed containers with water spray, remain upwind to avoid inhaling toxic gases
Personal Precautions: Evacuate non-essential personnel, ensure adequate ventilation, wear chemical-resistant gloves and eye protection
Environmental Precautions: Prevent spillage from entering drains, waterways, or soil
Cleanup Methods: Absorb with inert material such as vermiculite, collect in suitable containers for disposal, decontaminate surface with soap and water
Handling: Work in a fume hood or well-ventilated area, keep away from sources of ignition, avoid skin and eye contact, avoid inhaling vapors, use correct PPE
Storage: Store in tightly closed, properly labeled containers in a cool, dry, well-ventilated area away from incompatible substances such as strong oxidizing agents, acids, and bases
Storage Temperature: Below 25°C recommended
Engineering Controls: Use chemical fume hood, eye wash stations, and safety showers present in work area
Personal Protective Equipment: Chemical goggles or face shield, gloves made of nitrile or neoprene, lab coat or apron, respiratory protection if ventilation inadequate
Biological Exposure Limit: Not established, practice routine industrial hygiene
Appearance: Colorless to pale yellow liquid
Odor: Pungent, characteristic aroma
Melting Point: -18°C
Boiling Point: 194–197°C
Flash Point: 75°C (closed cup)
Solubility: Slightly soluble in water, soluble in organic solvents
Vapor Pressure: 0.16 mmHg at 25°C
Density: 1.181 g/cm³ at 20°C
Viscosity: Low viscosity liquid
Chemical Stability: Stable at recommended storage conditions
Reactivity: Reacts with strong oxidizing agents, acids, bases
Hazardous Decomposition: Fumes of carbon monoxide, carbon dioxide, sulfur oxides
Polymerization: Not known to occur under normal use conditions
Acute Toxicity: LD50 (oral, rat) roughly 350 mg/kg
Skin Irritation: May cause redness, irritation on prolonged or repeated contact
Eye Irritation: Risk of serious eye irritation, watering, pain
Inhalation: May irritate respiratory tract, cause dizziness or headache
Chronic Effects: Prolonged exposure impacts liver and kidney in laboratory animals
Carcinogenicity: Not listed as carcinogen by NTP, IARC, OSHA
Sensitization: No data available on sensitization
Aquatic Toxicity: Harmful to aquatic life, may cause long-term effects
Persistence and Degradability: Not readily biodegradable, persists in environment without microbial action
Bioaccumulation Potential: Potential exists due to partitioning into organic phases
Mobility in Soil: Moderate, compound may leach into groundwater
Other Adverse Effects: Avoid release to environment, data gaps exist for full ecological impact
Disposal Methods: Bring to licensed chemical waste disposal contractor, incinerate under controlled conditions
Contaminated Packaging: Triply rinse containers, dispose as hazardous waste, observe all federal, state, and local environmental laws
Waste Code: Generally classified as hazardous organic waste, check with local regulations before disposal
UN Number: UN 1993
UN Proper Shipping Name: Flammable liquid, n.o.s. (Thiophene-2-Carbaldehyde)
Transport Hazard Class: 3 (Flammable liquids)
Packing Group: III
Environmental Hazards: Not a marine pollutant under IMDG
Special Precautions: Avoid transport with incompatible materials such as strong oxidizing agents, corrosive substances, segregate properly, keep containers upright and secure
OSHA: Classified as hazardous per OSHA Hazard Communication Standard
TSCA: Listed on the United States TSCA inventory
SARA 313 / Title III: Not listed as a reportable substance
REACH: Registered or pre-registered in accordance with European Union REACH regulations
Other Regulations: Compliance needed with environmental protection laws and transport regulations, country-specific chemical control acts may apply
