Product Name: Thiophene-2-Thiol
Chemical Formula: C4H4S2
CAS Number: 23522-22-7
Synonyms: 2-Mercaptothiophene, 2-Thiophenethiol
Recommended Use: Laboratory chemicals, chemical synthesis, research
Manufacturer Information: Supplier’s name, address, and emergency contact number provided on label or technical data sheet
Classification: Flammable liquid, Harmful if swallowed, Causes skin irritation, Causes eye irritation, May cause respiratory irritation
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor. Harmful if swallowed. Causes skin and eye irritation. Vapors may cause drowsiness and dizziness.
Precautionary Statements: Keep away from open flames. Wear protective gloves and eye protection. Do not eat, drink, or smoke near product. Avoid breathing vapor or mist. Use only outdoors or in a well-ventilated area.
GHS Pictograms: Flame, Exclamation mark
Chemical Name: Thiophene-2-Thiol
CAS Number: 23522-22-7
Concentration: >99%
Impurities: Minimal; details on supplier certificate of analysis
Other Components: No other ingredients contribute significantly to hazard profile
General Advice: Remove from exposure, ensure access to fresh air, consult medical assistance for persistent symptoms.
Eye Contact: Rinse cautiously with water for at least 15 minutes. Remove contact lenses if present and easy to do. Seek medical attention.
Skin Contact: Remove contaminated clothing. Wash skin thoroughly with soap and water. Seek medical attention if irritation persists.
Inhalation: Move person to fresh air. Support breathing with oxygen if necessary. Seek medical advice if symptoms such as headache, dizziness, or respiratory distress develop.
Ingestion: Rinse mouth with water. Do not induce vomiting unless directed by medical personnel. Call poison center or seek medical help immediately.
Most Important Symptoms and Effects: Irritation, coughing, dizziness, gastrointestinal discomfort
Suitable Extinguishing Media: Dry chemical, CO2, alcohol-resistant foam
Unsuitable Extinguishing Media: Do not use water jet
Special Hazards: Vapors may form explosive mixtures with air. Fire may produce hazardous gases such as carbon oxides, sulfur oxides.
Protective Equipment: Firefighters must wear full protective gear and self-contained breathing apparatus.
Advice for Firefighters: Evacuate area, use water spray to cool unopened containers. Approach fire from upwind to avoid hazardous vapors.
Personal Precautions: Evacuate unnecessary personnel. Eliminate ignition sources. Ensure adequate ventilation.
Protective Equipment: Wear gloves, goggles, chemical resistant clothing, approved respirator.
Containment: Prevent entry into drains or watercourses. Contain spill using inert absorbent material such as sand or vermiculite.
Cleanup Procedures: Collect spilled material in suitable container for disposal. Wash spill area with plenty of water after material removal. Dispose of contaminated cleaning tools according to local regulations.
Environmental Precautions: Notify authorities if large quantities enter waterway or soil.
Precautions for Safe Handling: Avoid contact with skin or eyes. Avoid inhaling vapor or mist. Use spark-proof tools and explosion-proof equipment.
Storage Conditions: Store in tightly closed original container, in cool, dry, and well-ventilated area. Keep away from incompatible substances, heat, sparks, and open flame.
Storage Temperature: Recommended storage at room temperature, protected from moisture and direct sunlight.
Incompatible Materials: Strong oxidizers, strong bases, acids
Specific End Uses: For laboratory and industrial applications only.
Engineering Controls: Use local exhaust ventilation or work in fume hood.
Exposure Limits: No occupational exposure limits established; minimize exposure to vapors.
Personal Protective Equipment:
- Eye/Face Protection: Safety goggles with side shields
- Skin Protection: Chemical-resistant gloves (nitrile, PVC), lab coat or apron
- Respiratory Protection: In case of inadequate ventilation, use approved respirator with organic vapor cartridge
- Hygiene Measures: Wash hands thoroughly after handling. Remove contaminated clothing and wash before reuse
Appearance: Pale yellow to light brown liquid
Odor: Pungent, sulfurous
Odor Threshold: Not available
pH: Not applicable (non-aqueous)
Melting Point: -20°C
Boiling Point: 184-188°C
Flash Point: 59°C (closed cup)
Evaporation Rate: Not determined
Flammability: Flammable liquid
Explosive Limits: Not determined
Vapor Pressure: 0.4 mmHg at 25°C
Vapor Density: Heavier than air
Specific Gravity: 1.25 (water = 1)
Solubility: Slightly soluble in water, miscible with most organic solvents
Partition Coefficient (n-octanol/water): No data available
Autoignition Temperature: 266°C
Decomposition Temperature: Not determined
Viscosity: Not determined
Chemical Stability: Stable under recommended storage and handling conditions
Reactivity: Flammable; reacts with strong oxidizing agents
Hazardous Reactions: Can form toxic gases if heated strongly or in contact with acids or oxidizers
Conditions to Avoid: Heat, open flames, sparks, strong oxidizers
Incompatible Materials: Peroxides, nitric acid, strong alkalis
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, sulfur oxides
Acute Toxicity: Harmful if swallowed; estimated oral LD50 (rat) >300 mg/kg
Inhalation: Vapors may cause drowsiness, respiratory irritation, headache
Skin Corrosion/Irritation: Causes skin irritation on contact
Eye Damage/Irritation: May cause serious damage to eyes
Sensitization: Not classified, but caution advised for repeated exposure
Chronic Effects: Prolonged or repeated exposure may cause dermatitis, symptoms of nervous system depression
Carcinogenicity: No data indicating carcinogenic effects in humans
Mutagenicity: Not classified as mutagenic
Reproductive Toxicity: No reliable studies available
Aquatic Toxicity: Harmful to aquatic life, especially in large quantities
Persistence and Degradability: Not readily biodegradable
Bioaccumulation Potential: May bioaccumulate in aquatic organisms due to partial water solubility and organic nature
Mobility in Soil: Limited mobility, tends to partition into organic phase
Other Adverse Effects: Avoid uncontrolled release to the environment
Waste Treatment Methods: Dispose of unused product and contaminated materials as hazardous chemical waste
Disposal Containers: Collect and place in sealed, labeled containers;
Methods of Disposal: Incineration in licensed facility is recommended
Regulations: Follow local, national, and international regulations regarding chemical disposal
Contaminated Packaging: Handle as hazardous waste; do not reuse containers
UN Number: 3338
Proper Shipping Name: Thiophene-2-Thiol
Transport Hazard Class: 3 – Flammable Liquid
Packing Group: III
Labels: Flammable liquid
Marine Pollutant: Not applicable
Special Precautions: Store and transport in upright, sealed, and properly marked containers. Provide documentation for hazardous materials where required. Follow carrier regulations.
Emergency Response Guide: Reference code 128
U.S. TSCA Inventory: Listed
EU REACH Status: Registration may be required
OSHA Hazardous Chemical: Classified as hazardous
WHMIS Classification (Canada): Flammable, Toxic Material
SARA Title III: Not subject to reporting under Sections 302, 304, 313
Hazard Category: Acute Health Hazard, Fire Hazard
Other Regulations: Comply with all local, national, and international chemical safety regulations.
Product Labeling: GHS labels required for container marking and transport.
