Ethylene Dichloride (EDC)

   CAS No.: 107-06-2
   Synonyms / IUPAC Name: Ethylene dichloride; 1,2-Dichloroethane
   Molecular Formula: C₂H₄Cl₂
   Molecular Weight: ≈98.96 g/mol
   Appearance: Clear, colourless to slightly oily liquid with a chloroform-like odour.

Physicochemical Properties (Typical)

• Melting / Freezing Point: ~−35 °C
• Boiling Point: ~83 °C
• Density: ~1.25 g/cm³ at 20–25 °C
• Solubility: Slightly soluble in water (~7.9 g/L at 25 °C); miscible with many organic solvents.
• Flash Point: ~13–14 °C (closed cup, high-purity material)
• Explosive Limits in Air: ~6.2% (lower) to ~16% (upper) by volume

Purity & Quality Standards

• Typical Purity: ≥99% by GC for commercial grades.
• Appearance: Should be clear, free of visible particulates or haze; colour and odour consistent with specification.
• Stability: Stable under sealed storage conditions, protected from moisture, heat, and direct sunlight.

Applications / Uses

• Intermediate for production of vinyl chloride monomer (VCM), which is used to produce PVC.
• Previously used as a solvent for degreasing, cleaning, asphalt and pavement formulations (usage now limited due to toxicity concerns).
• Also used as a chemical feedstock in organic synthesis and extraction processes.

Safety & Handling

• Hazard Classification: Highly flammable liquid and vapour; vapour heavier than air and may accumulate in low areas.
• Health Hazards:
• Inhalation: Vapours may cause dizziness, headache, and respiratory irritation; high exposures can cause more severe effects.
• Skin Contact: May defat the skin and cause irritation.
• Eye Contact: May cause serious irritation.
• Precautions:
• Use only in well-ventilated areas or under local exhaust ventilation.
• Keep away from heat, sparks, open flames, and hot surfaces.
• Ensure proper grounding and bonding of containers when transferring material.
• Wear protective gloves, eye/face protection, and flame-resistant clothing.
• Reactivity / Incompatibilities: Avoid strong oxidising agents and contact with reactive metals in presence of moisture (risk of corrosion). Vapour may form explosive mixtures with air.
• First Aid Measures:
• Inhalation: Move to fresh air and rest; seek medical attention if symptoms persist.
• Skin Contact: Remove contaminated clothing; wash skin thoroughly with water.
• Eye Contact: Rinse cautiously with water for several minutes; seek medical attention if irritation continues.
• Ingestion: Do not induce vomiting; seek immediate medical attention.

Packaging & Storage

• Packaging: Supplied in sealed, solvent-compatible containers (e.g., metal drums or lined containers) rated for flammable liquids.
• Storage Conditions: Store in a cool (<30 °C), dry, well-ventilated area away from ignition sources and direct sunlight. Keep containers tightly closed when not in use.
• Shelf Life: Stable under recommended storage conditions; inspect appearance, odour, and container integrity before use.
• Transport: Classified as a flammable liquid (UN 1184 – Ethylene Dichloride); comply with applicable transport regulations.