Product name: 3,4-Ethylene Dioxy Thiophene
Chemical formula: C6H6O2S
Chemical family: Thiophenes
Synonyms: EDOT, 2,3-Dihydrothieno[3,4-b][1,4]dioxine
CAS number: 126213-50-1
Recommended uses: Polymer precursor, conductive polymers, chemicals research
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Classification: Flammable liquids, Category 3; Acute toxicity, Oral, Category 4; Eye irritation, Category 2A
GHS label elements: Pictograms include flame, exclamation point
Signal word: Warning
Hazard statements: Liquid and vapors are flammable; causes skin and eye irritation; harmful if inhaled or swallowed
Precautionary statements: Avoid ignition sources. Use personal protective equipment as required. Do not breathe vapors. Store in well-ventilated areas away from heat.
Routes of entry: Inhalation, skin and eye contact, ingestion
Potential health effects: Respiratory tract irritation, possible dizziness, headache, possible mild effects on the liver and kidneys with chronic exposure
Chemical name: 3,4-Ethylene Dioxy Thiophene
Common name and synonyms: EDOT
Concentration: ≥ 99% by weight
CAS number: 126213-50-1
Impurities: Typically less than 1% unidentified impurities; main impurity may be water or residual solvents from synthesis
Inhalation: Move victim to fresh air, keep comfortable for breathing. Seek medical attention if symptoms persist.
Skin contact: Remove contaminated clothing. Rinse affected skin thoroughly with soap and water. Get medical advice if irritation continues.
Eye contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Keep rinsing. Get medical help right away for pain or vision problems.
Ingestion: Rinse mouth. Do NOT induce vomiting. Give small amounts of water if conscious. Call poison control or doctor immediately.
Most important symptoms/effects: May include redness, stinging, difficulty breathing, nausea, or dizziness
Suitable extinguishing media: Carbon dioxide, dry chemical powder, foam, water spray (do not use strong water jet)
Unsuitable extinguishing media: Direct water streams may spread fire
Specific hazards: Releases carbon oxides and toxic sulfur oxides under fire conditions. Vapors are heavier than air and may travel to distant ignition sources.
Protective equipment: Firefighters should use self-contained breathing apparatus and full protective gear
Fire fighting instructions: Evacuate area, fight fire from safe distance, cool adjacent containers with water spray to prevent pressure build-up
Personal precautions: Keep away from open flames and hot surfaces. Wear suitable gloves, goggles, and protective clothing. Prevent inhalation of vapor.
Environmental precautions: Prevent spills from entering drains, soil, or water sources. Alert authorities in case of significant spill.
Methods for containment and cleanup: Ventilate area, contain and collect spill with inert absorbent (sand, earth, vermiculite), place waste into labeled containers for disposal. Clean area with suitable solvent. Dispose as hazardous waste.
Handling precautions: Handle in a chemical fume hood. Avoid contact with skin, eyes, or clothing. Ground and bond containers for flammable liquids. Prevent formation of vapors or mists.
Hygiene measures: Wash hands thoroughly after use. Do not eat, drink, or smoke when working with this substance.
Storage conditions: Store in tightly closed original containers, kept upright and away from direct sunlight, ignition sources, and oxidizers. Recommended temperature: below 25°C in a cool, ventilated area.
Exposure limit values: No specific occupational exposure limits established. Apply general chemical hygiene standards.
Engineering controls: Use fume hoods or local exhaust ventilation to minimize exposure. Ensure eye wash and safety showers are easily accessible.
Personal protection: Wear chemical splash goggles, chemical-resistant gloves (nitrile, neoprene), lab coat or apron, appropriate respirators if vapor concentration is high
Environmental exposure controls: Prevent release into the environment, especially drains
Appearance: Colorless to pale yellow liquid
Odor: Weak characteristic
Odor threshold: Not available
pH: Not determined
Melting point/freezing point: -11°C
Boiling point: 206°C at 760 mmHg
Flash point: 98°C
Evaporation rate: Not available
Flammability: Flammable liquid
Vapor pressure: 0.20 mmHg at 25°C
Vapor density: Not determined
Relative density: 1.34 g/cm³
Solubility: Slight solubility in water; soluble in organic solvents
Partition coefficient n-octanol/water: Not determined
Auto-ignition temperature: Not available
Decomposition temperature: Not available
Viscosity: Not determined
Chemical stability: Stable under recommended storage conditions
Possibility of hazardous reactions: May polymerize if exposed to acids, oxidizers, or light
Conditions to avoid: Strong heat, sparks, flames, high temperatures, incompatible materials
Incompatible materials: Strong oxidizing agents, strong acids
Hazardous decomposition products: Carbon monoxide, carbon dioxide, sulfur oxides, other toxic vapors
Acute toxicity: Harmful if swallowed; LD50 (oral, rat): > 300 mg/kg
Skin corrosion/irritation: Causes skin irritation on contact
Serious eye damage/irritation: Causes eye irritation
Respiratory or skin sensitization: Not classified as a sensitizer, but may cause mild irritation with repeated exposure
Germ cell mutagenicity: Not classified
Carcinogenicity: Not listed by IARC, NTP, or OSHA as a carcinogen
Reproductive toxicity: Not classified
Specific target organ toxicity - single exposure: May cause respiratory irritation
Specific target organ toxicity - repeated exposure: Data insufficient for long-term effects
Aspiration hazard: Not classified
Toxicity: Harmful to aquatic organisms with long lasting effects. LC50 (fish): Not determined accurately, but low water solubility indicates moderate hazard
Persistence and degradability: Not readily biodegradable; may persist in aqueous environments
Bioaccumulative potential: Likely to have moderate bioaccumulation in aquatic organisms
Mobility in soil: Low mobility due to low water solubility
Other adverse effects: Do not allow to enter watercourses or soil
Waste disposal methods: Dispose of as hazardous chemical waste in accordance with local, regional, and national regulations. Incineration in a licensed facility is preferred if feasible. Dilute residue and contaminated packaging should also be handled as hazardous waste.
Containers: Rinse thoroughly, puncture or crush, and dispose of by approved chemical waste service.
Precautions: Do not allow product to reach sewer systems; avoid any release to the environment
UN number: 1993
UN proper shipping name: Flammable liquid, n.o.s. (3,4-Ethylene Dioxy Thiophene)
Transport hazard class: 3
Packing group: III
Environmental hazards: Not classified as marine pollutant
Special precautions: Keep containers upright and secure. Separate from foodstuffs. Follow rules for flammable liquids during road, rail, air, or sea transport.
ERG code: 128
US OSHA: Hazardous chemical, regulated under Hazard Communication Standard 29 CFR 1910.1200
TSCA: Listed
European EINECS: 603-713-6
REACH registration: Required for amounts above 1 tonne per year
Canada DSL/NDSL: Listed/Subject to verification
Other regulations: Subject to transport regulations for dangerous goods. Environmental and chemical safety laws apply in most jurisdictions. GHS labelling enforced in most countries.
