Oxalyl Chloride 

CAS No.: 79-37-8 | EC No.: 201-200-2

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1. Chemical Identification

Property	Specification
IUPAC Name	Ethanedioyl dichloride
Molecular Formula	C₂Cl₂O₂
Molecular Weight	126.93 g/mol
Appearance	Colorless to yellow liquid
Density	1.50 g/mL at 20°C
Melting Point	-10 to -8°C
Boiling Point	63-64°C
Refractive Index	n<sup>20</sup><sub>D</sub> 1.429
Vapor Pressure	115 mmHg at 20°C

Synonyms:
Oxalic dichloride, Ethanedioyl chloride

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2. Key Applications

Chemical Synthesis

• Pharmaceutical Intermediates:
  ✓ Production of active pharmaceutical ingredients
  ✓ Carboxylic acid activation
• Agrochemical Manufacturing:
  ✓ Pesticide synthesis
  ✓ Herbicide production

Industrial Processes

• Dye Production: Key intermediate for colorants
• Polymer Chemistry:
  ✓ Polyamide synthesis
  ✓ Liquid crystal production

Specialty Applications

• Chemical luminescent agents
• High-purity reagent for organic synthesis

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3. Product Advantages

✔ High Reactivity – Excellent acylating agent
✔ Versatile Intermediate – Multiple synthetic applications
✔ Process Efficiency – Enables clean reaction pathways

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4. Physical & Chemical Properties

• Solubility:
  • Reacts violently with water
  • Miscible with organic solvents (ether, THF)
• Stability:
  • Moisture-sensitive – store under inert atmosphere
  • Decomposes above 64°C

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5. Handling & Storage

Parameter	Requirement
Storage Temp	2-8°C (under nitrogen)
Packaging	25kg stainless steel drums
Shelf Life	12 months
Special Notes	Store away from moisture

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6. Safety Information

Danger!

• H314: Causes severe skin burns and eye damage
• H330: Fatal if inhaled
• H335: May cause respiratory irritation

Protective Measures:

• P260: Do not breathe vapor
• P280: Wear chemical-resistant gloves/face shield
• P303+P361+P353: Skin contact wash procedure

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7. Quality Specifications

• Purity: ≥98% (GC)
• Chloride Content: ≤0.1%
• Water Content: ≤0.05%

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Disclaimer:
This material requires specialized handling facilities. Must be used with proper engineering controls and PPE. Users must be trained in handling highly toxic substances.