2,4-Dichlorobenzoyl chloride
Agrochemicals 2025-03-02
2,4-Dichlorobenzoyl Chloride
Chemical Name: 2,4-Dichlorobenzoyl chloride
Synonyms: DCBC; 2,4-Dichlorobenzoic acid chloride
CAS Number: 89-75-8
Molecular Formula: C₇H₃Cl₃O
Molecular Weight: 209.45 g/mol
Physical & Chemical Properties
| Property | Value |
|---|---|
| Appearance | Colorless to pale yellow liquid |
| Odor | Pungent, irritating (lachrymatory) |
| Melting Point | 16-18°C (61-64°F) |
| Boiling Point | 254-256°C (489-493°F) |
| Density | 1.494 g/cm³ (25°C) |
| Refractive Index | 1.573 (20°C) |
| Vapor Pressure | 0.01 mmHg (20°C) |
| Solubility | Reacts with water; soluble in organic solvents |
Hazard & Safety Information (GHS)
Danger Symbols:
☠️ Toxic (T)
⚠️ Corrosive (C)
Hazard Statements:
• H302: Harmful if swallowed
• H314: Causes severe skin burns and eye damage
• H330: Fatal if inhaled
• H335: May cause respiratory irritation
• H411: Toxic to aquatic life
Precautionary Measures:
• P260: Do not breathe dust/fume/gas
• P280: Wear gloves/face shield/eye protection
• P303+P361+P353: IF ON SKIN: Remove clothing, rinse skin
• P305+P351+P338: IF IN EYES: Rinse cautiously
Chemical Behavior
• Reactivity:
- Violently reacts with water/alcohols (hydrolysis)
- Incompatible with bases, oxidizing agents
- Releases HCl gas on decomposition
• Stability: - Moisture-sensitive (store under inert gas)
- Light-sensitive (amber glass recommended)
Applications
✔ Key intermediate for:
- Herbicides (e.g., 2,4-D esters)
- Pharmaceuticals
- Dyes and pigments
✔ Acylating agent in organic synthesis
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