Product Name: 2-Chloro-3-Methylthiophene
Chemical Formula: C5H5ClS
Molecular Weight: 132.61 g/mol
CAS Number: 18368-64-4
EC Number: 629-087-3
Recommended Use: Laboratory chemicals, synthesis intermediates
Supplier: Laboratory chemical supplier, contact details on commercial invoice
Emergency Contact: Refer to local emergency number or supplier's emergency hotline
Classification: Flammable liquid, Skin irritation, Eye irritation, Acute toxicity (oral, inhalation), Hazardous to aquatic environment
Signal Word: Warning
Hazard Statements: Highly flammable liquid and vapor; causes skin irritation; causes eye irritation; harmful if swallowed or inhaled; toxic to aquatic life
Precautionary Statements: Keep away from heat, sparks, open flame; avoid breathing vapors; avoid release to environment; wear protective gloves and eye/face protection; wash thoroughly after handling; if swallowed, rinse mouth and do not induce vomiting
GHS Symbols: Flame, Exclamation mark, Environment
Chemical Identity: 2-Chloro-3-Methylthiophene
Concentration: >98% pure
Common Impurities: Trace organic solvents, minor thiophene derivatives
Additional Components: None of significant quantity
Inhalation: Move person to fresh air; provide oxygen if breathing is difficult; seek medical attention for persistent symptoms
Skin Contact: Remove contaminated clothing, rinse skin under running water for at least 15 minutes; seek medical attention for persistent irritation
Eye Contact: Rinse cautiously with water for several minutes; remove contact lenses if present and easy to do; continue rinsing and seek medical help
Ingestion: Do not induce vomiting; rinse mouth thoroughly; provide water if victim is conscious; get immediate medical attention
Most Important Symptoms: Respiratory tract irritation, skin redness or burns, eye watering and soreness, gastrointestinal upset
Suitable Extinguishing Media: Alcohol-resistant foam, dry chemical powder, carbon dioxide, water spray for cooling containers
Specific Hazards: Emits toxic fumes of hydrogen chloride, sulfur oxides under fire conditions; vapors may form explosive mixtures with air
Firefighter Precautions: Wear self-contained breathing apparatus and full protective gear; use water spray to cool exposed containers
Personal Protection: Move container from fire area if you can do so safely; prevent runoff from fire control into sewers and waterways
Evacuation Procedures: Isolate spill area, ventilate area, eliminate ignition sources
Personal Protective Equipment: Nitrile gloves, splash goggles, lab coat, suitable respiratory protection
Spill Clean-Up: Absorb with inert material (sand, earth); collect and seal in properly labeled containers; wash spill site after cleanup
Environmental Precautions: Prevent entry into drains, water courses, or soil; notify authorities if spill reaches environment
Handling: Work in a well-ventilated area, avoid inhalation of vapor, avoid skin and eye contact; keep away from sources of ignition; use spark-proof tools
Safe Storage Conditions: Store in tightly sealed container; keep in a cool, dry, and well-ventilated location; protect from moisture and incompatible substances
Incompatible Materials: Strong oxidizing agents, strong acids, bases, sources of ignition
Specific Storage Instructions: Store separately from food and drinks, label area accurately, monitor for leaks or degradation
Exposure Limits: No workplace exposure limits established, avoid excessive exposure
Engineering Controls: Use fume hood, explosion-proof ventilation, ground and bond containers during transfers
Personal Protective Equipment: Chemical-resistant gloves, lab apron, safety goggles or face shield, approved respirator in case of inadequate ventilation
Hygiene Measures: Wash hands after use; remove contaminated clothing; do not eat, drink, or smoke in chemical areas
Appearance: Clear colorless to pale yellow liquid
Odor: Sulfur-like, unpleasant
pH: Not applicable
Boiling Point: 133-135°C (approximate at 760 mmHg)
Melting Point: Below -20°C
Flash Point: 31°C
Flammability: Highly flammable
Vapor Pressure: Moderate at room temperature
Solubility: Insoluble in water; soluble in organic solvents (acetone, ether)
Density: Approximately 1.19 g/cm³
Partition Coefficient (log Kow): Estimated 2.6–2.8
Chemical Stability: Stable under recommended storage conditions; avoid exposure to heat, sparks, and open flame
Reactivity: Reacts with strong oxidizers, acids, bases
Decomposition Products: Produces sulfur oxides, hydrogen chloride, possibly toxic organic fumes on combustion or breakdown
Hazardous Polymerization: Not expected under normal conditions
Other Information: Sensitive to light and air; recommend inert atmosphere for long-term storage
Routes of Exposure: Inhalation, ingestion, skin contact, eye contact
Acute Toxicity: Harmful if inhaled, may cause drowsiness, dizziness, nausea, headaches on acute exposure; harmful if swallowed causing gastrointestinal upset
Skin Corrosivity: Causes irritation, redness, possible burns with prolonged contact
Eye Damage: Causes redness, tearing, stinging
Chronic Toxicity: Prolonged exposure may affect liver, kidneys, central nervous system
Carcinogenicity: Not listed as a carcinogen by OSHA, IARC, or NTP
Sensitization: Cases not well documented but proceed with caution for potentially allergic individuals
LD50/LC50 Data: No comprehensive animal data available for specific compound; structurally related thiophenes may display moderate toxicity
Aquatic Toxicity: Toxic to aquatic organisms; high potential for acute aquatic toxicity
Mobility in Soil: Expected to have low mobility due to hydrophobic nature
Bioaccumulation Potential: Potential to bioaccumulate in aquatic species due to physical properties
Persistence/Degradability: May persist in environment; slow microbial degradation expected under standard conditions
Other Hazards: Volatile; vapor may travel and pose risk to distant aquatic receptors
Additional Information: Avoid discharge into the environment; adhere to disposal and containment guidelines
Disposal Methods: Incinerate at approved chemical incineration facility; dispose of in accordance with all federal, state, and local regulations; consult licensed waste disposal contractor
Contaminated Packaging: Triple rinse containers; destroy packaging as hazardous waste if contaminated
Special Precautions: Do not allow chemical to reach sewage systems; improper disposal may create environmental hazards
UN Number: 1993
Proper Shipping Name: Flammable liquid, n.o.s. (2-Chloro-3-Methylthiophene)
Hazard Class: 3 (Flammable liquid)
Packing Group: III
Label Requirements: Flammable liquid label
Environmental Risks: Contains substance dangerous to aquatic life; inform carrier of special hazard
Special Precautions for Transport: Keep containers tightly sealed; secure load to prevent movement; avoid temperature extremes during transport
TSCA Inventory: Listed
EINECS/ELINCS: Listed
SARA Title III: Not subject to specific reporting requirements under Sections 302, 304, 313
CERCLA Hazardous Substance: Not listed
California Proposition 65: Not known to contain substances that require warning
Other Local/International Regulations: Comply with all applicable occupational, environmental, and transportation regulations; check regional authority guidelines for specific restrictions or exposure measures
