2,4-Dichlorobenzoyl chloride

Introduction

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

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