Product Name: 2.5-Dichloro-3-Methylthiophene
Chemical Formula: C5H4Cl2S
CAS Number: 17236-81-2
Recommended Use: Laboratory research, chemical synthesis
Manufacturer/Supplier: Chemical manufacturer or distributor details on product packaging
Emergency Contact: Emergency telephone number found on chemical label or manufacturer’s website
GHS Classification: Acute toxicity (oral, inhalation), Skin and eye irritation, Specific target organ toxicity - single exposure
Signal Word: Warning
Hazard Statements: Harmful if swallowed, causes skin irritation, may cause respiratory irritation
Pictograms: Exclamation mark
Precautionary Statements: Avoid breathing vapor or dust, wash hands thoroughly after handling, use only outdoors or in a well-ventilated area, call a poison center or doctor if you feel unwell, wear protective gloves
Chemical Name: 2,5-Dichloro-3-methylthiophene
Synonyms: None known
Concentration: ≥98%
Impurities: Trace levels of related thiophene compounds and residual solvents (see certificate of analysis for specifics)
Inhalation: Move affected person to fresh air, support breathing as needed, seek medical advice if symptoms develop
Skin Contact: Remove contaminated clothing, rinse skin with water for at least 15 minutes, consult a doctor if irritation persists
Eye Contact: Rinse cautiously with water several minutes, remove contact lenses if present and easy to do, continue rinsing, seek immediate medical attention
Ingestion: Rinse mouth, never give anything by mouth to an unconscious person, do not induce vomiting, get medical assistance quickly
Suitable Extinguishing Media: Use water spray, alcohol-resistant foam, dry chemical, or carbon dioxide
Hazards from Combustion: Toxic fumes of hydrogen chloride, phosgene, sulfur oxides, and carbon oxides can form
Protective Equipment: Wear self-contained breathing apparatus and full protective clothing
Advice for Firefighters: Keep containers cool with water spray, prevent run-off from entering drains, move containers from fire area if possible without risk
Personal Precautions: Avoid inhaling vapors, provide adequate ventilation, evacuate unnecessary personnel
Protective Equipment: Gloves, protective goggles, lab coat, and respirator if needed
Spill Response: Absorb with inert material (sand, vermiculite), place in chemical waste container, clean area thoroughly
Environmental Precautions: Prevent entry into drains, sewers, or waterways, notify local authorities if contamination occurs
Handling: Handle with care in a chemical fume hood, avoid contact with skin and eyes, avoid inhaling vapor or dust, no eating, drinking, or smoking
Storage: Store in tightly sealed container, keep in a cool, dry, well-ventilated location, store away from incompatible substances such as strong oxidizers and acids
Specific Storage Hazards: Protect from moisture and direct sunlight, store away from food and beverages
Engineering Controls: Chemical fume hood, local exhaust ventilation
Personal Protective Equipment: Nitrile or neoprene gloves, safety goggles or face shield, flame-resistant lab coat
Respiratory Protection: Approved respirators for organic vapors if exposure limits are exceeded
Hygiene Measures: Wash hands after handling, remove contaminated clothing before entering eating areas, launder lab coats regularly
Appearance: Colorless to pale yellow liquid
Odor: Characteristic, pungent
Boiling Point: 210–220°C
Melting Point: Data not available
Flash Point: 88–90°C
Vapor Pressure: Low at room temperature
Solubility: Low solubility in water, soluble in organic solvents
Density: Approximately 1.4 g/cm³
pH: Not applicable
Partition Coefficient (n-octanol/water): Not specified
Viscosity: Not determined
Chemical Stability: Stable under standard conditions
Incompatible Materials: Strong oxidizers, strong acids
Hazardous Decomposition Products: Hydrogen chloride gas, sulfur oxides, carbon oxides
Conditions to Avoid: Excessive heat, open flame, moisture
Polymerization: Not expected to occur
Acute Toxicity: Harmful if swallowed or inhaled, toxicological data limited due to niche use
Skin Irritation: Likely to cause moderate to severe irritation on contact
Eye Irritation: Likely to cause serious eye irritation
Chronic Effects: Long-term exposure not well studied, repeated contact may dry or crack skin
Potential Routes of Exposure: Inhalation, ingestion, skin, and eye contact
Symptoms of Overexposure: Irritation, headache, nausea, respiratory discomfort, skin redness
Carcinogenicity, Mutagenicity, Reproductive Toxicity: No reliable data available, treat as a chemical of unknown hazard
Aquatic Toxicity: Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
Persistence and Degradability: Expected to persist based on chemical structure
Bioaccumulation Potential: Bioaccumulation not well characterized, possible based on structure
Mobility in Soil: Low mobility expected, but spillage into soil should be prevented
Other Adverse Effects: Chemical may cause disruption of aquatic systems, avoid environmental release
Waste Treatment Methods: Dispose of according to local, regional, and national regulations
Contaminated Packaging: Empty containers must be treated as hazardous chemical waste
Precautions for Disposal: Do not discharge to sewer systems, incinerate in accordance with approved facilities, label all waste containers properly
Consultation: Discuss disposal options with environmental authorities or approved waste contractors
UN Number: Not assigned
Transport Hazard Class: Not regulated under many national and international rules for small quantities, check specific country requirements
Packing Group: Not classified
Shipping Name: Laboratory chemical, not otherwise specified (observe all labeling requirements)
Environmental Hazards: Marine pollutant; avoid shipment in large quantities near waterways
Transport Precautions: Protect from physical damage, spills, leaks, inform carrier of chemical nature
Labelling: Label in accordance with local, regional, and international standards for hazardous chemicals
Inventory Status: May not be listed on all chemical inventories, check local chemical regulations
Restrictions: Restricted to professional users and laboratories, not for food, drug, or home use
Workplace Exposure Guidelines: No established occupational exposure limits, employers must provide appropriate controls
Other Regulations: Comply with REACH, TSCA, and other region-specific chemical safety rules as applicable
