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Product Name: Tetracyanoethylene
Chemical Formula: C6N4
CAS Number: 670-54-2
Synonyms: TCNE, Ethylene tetracarbonitrile
Use: Organic synthesis, electronics, specialty chemical manufacturing
Manufacturer Details: Provided on request
Emergency Telephone: Local emergency contact recommended for immediate support
Hazard Classification: Acute toxicity (oral, dermal, inhalation), Eye irritation
Signal Word: Danger
Hazard Statements: Toxic if swallowed, in contact with skin, or inhaled. May cause respiratory irritation. Causes serious eye irritation. Suspected of damaging fertility or the unborn child
Pictograms: Skull and crossbones, exclamation mark, health hazard
Precautionary Statements: Avoid breathing dust, wash thoroughly after handling, do not eat, drink or smoke near product, wear protective gloves and eye protection, use only outdoors or in well-ventilated areas
Chemical Name: Tetracyanoethylene
CAS No.: 670-54-2
Percentage: Greater than 99% by weight
Impurities/ Stabilizing Additives: None reported by most suppliers
Molecular Weight: 128.09 g/mol
Inhalation: Move person to fresh air; call medical support if symptoms persist; provide oxygen if breathing is difficult
Skin Contact: Remove contaminated clothing immediately; wash skin with water and soap for at least 15 minutes
Eye Contact: Rinse eyes with clean water for at least 15 minutes, hold eyelids open; seek medical assistance
Ingestion: Rinse mouth, do not induce vomiting; seek medical advice promptly; monitor for symptoms of toxicity such as nausea, dizziness or respiratory distress
Most Important Symptoms: May include irritation, redness, burns, breathing difficulty, nausea and possible systemic toxicity
Immediate Medical Attention: Necessary in severe cases of exposure
Suitable Extinguishing Media: Dry chemical powder, carbon dioxide, foam, water spray
Unsuitable Extinguishing Media: Do not use direct water jets on burning material
Specific Hazards: Toxic fumes such as hydrogen cyanide and nitrogen oxides may develop on combustion
Firefighting Equipment: Wear full protective gear and self-contained breathing apparatus
Special Precautions: Remain upwind, prevent runoff from fire control into waterways, evacuate personnel from area if necessary
Personal Precautions: Use proper personal protection equipment including gloves, eye protection, approved respirator; avoid dust formation
Environmental Precautions: Prevent spill from entering drains, surface water or soil
Cleanup Methods: Pick up powder with approved vacuum device or wet sweeping, place in suitable labeled container for disposal
Emergency Procedures: Ventilate area, evacuate unnecessary personnel, report significant spills to environmental authorities as required
Handling: Minimize dust generation and accumulation; use in well-ventilated areas; avoid all unnecessary exposure to product and vapors; wash hands after handling
Storage Conditions: Store in tightly closed containers in a cool, dry, well-ventilated space, away from heat, open flames, strong acids and bases; retain in original packaging to avoid contamination
Incompatibilities: Bases, strong oxidizing agents, reducing agents; segregate from strong acids, food and animal feeds
Technical Measures: Use grounded equipment, explosion-proof ventilation, and ensure containers remain upright
Control Parameters: No established occupational exposure limit values in many countries; local workplace guidelines should guide exposure monitoring
Engineering Controls: Use local exhaust ventilation, process enclosure or other measures to keep airborne levels below recommended limits
Personal Protection: Nitrile or chemical-resistant gloves, splash-proof safety goggles, lab coat or chemical apron, particulate respirator or half-mask if dust is generated
Hygiene Measures: Remove and wash contaminated clothing before reuse; avoid contact with skin or eyes; do not eat, drink, or smoke when handling
Appearance: Pale yellow crystalline solid
Odor: Slight, not strong
Melting Point: Approximately 200–220 °C (decomposes)
Boiling Point: Not available, decomposes before boiling
Density: About 1.36 g/cm³
Solubility: Slightly soluble in water, soluble in organic solvents such as acetone, ethanol and ether
Vapor Pressure: Negligible at room temperature
Flash Point: Not flammable under normal conditions
pH: Not applicable
Chemical Stability: Stable under normal handling and storage conditions, sensitive to strong bases and reducing agents
Reactive Conditions: Avoid excessive heat, exposure to moisture, incompatible materials
Incompatible Materials: Strong bases, reducing agents, strong acids, oxidizers
Decomposition Products: Hydrogen cyanide, nitrogen oxides, irritating organic fumes
Hazardous Polymerization: Does not occur under normal conditions
Acute Toxicity: Highly toxic by ingestion, inhalation and skin absorption
Oral LD50 (Rat): Less than 30 mg/kg
Inhalation: May cause damage to respiratory tract; symptoms include cough, shortness of breath, and possible lung edema
Skin Irritation: Causes severe irritation with redness, possible chemical burns after prolonged contact
Eye Damage: Severe irritant; may cause burning, tearing, and blurred vision
Chronic Effects: Repeated exposure may affect nervous system, liver, kidneys, blood-forming organs; possible reproductive toxicity
Carcinogenicity: Not listed as a known human carcinogen by IARC, NTP, or OSHA
Ecotoxicity: Highly toxic to aquatic life; may cause long-term adverse effects in aquatic environments
Persistence and Degradability: Low biodegradability, persistent in soil and water
Bioaccumulative Potential: Potential for bioaccumulation in aquatic organisms (no extensive data available)
Mobility in Soil: Likely low due to low solubility
Other Harmful Effects: Significant releases could affect local watercourses and groundwater; special care needed to avoid environmental contamination
Waste Disposal Methods: Dispose as hazardous chemical waste through licensed disposal contractors; do not flush into sewers or waterways
Product Disposal: Treat as special waste; use high-temperature incineration where available
Contaminated Packaging: Rinse and dispose of containers according to regulations; avoid reuse
Legal Requirements: Compliance with local, national, and international regulations governing hazardous waste
UN Number: 2811
UN Proper Shipping Name: Toxic solids, organic, n.o.s. (contains Tetracyanoethylene)
Hazard Class: 6.1 (Toxic substances)
Packing Group: II
Label: Toxic
Special Provisions: Avoid dust formation, tightly seal packages, secure vehicle loads, transport in accordance with International Carriage of Dangerous Goods by Road (ADR), IMDG, IATA requirements
Environmental Hazards: Marked environmentally hazardous substance
Workplace Classification: Subject to local occupational health and safety regulations
OSHA Status: Not specifically regulated, but covered under general hazardous substance requirements
TSCA: Listed
REACH: Requires registration for quantities over 1 tonne/year within EU
Inventory Listings: Appears on AICS, DSL, ENCS, KECI, PICCS, TCSI
Labeling Requirements: Hazard labeling in line with GHS standards for toxic chemicals; Safety Data Sheet must be available in workplace
Other Regulation: Reporting requirements may apply for larger volumes or if released into the environment; local transport and storage regulations apply
