Oxalyl Chloride CAS No. 79-37-8
Agrochemicals 2025-03-02
Oxalyl Chloride
CAS No.: 79-37-8 | EC No.: 201-200-2
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
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
3. Product Advantages
✔ High Reactivity – Excellent acylating agent
✔ Versatile Intermediate – Multiple synthetic applications
✔ Process Efficiency – Enables clean reaction pathways
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
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 |
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
7. Quality Specifications
- Purity: ≥98% (GC)
- Chloride Content: ≤0.1%
- Water Content: ≤0.05%
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.
