Agrochemicals

Terephthaloyl Chloride 

CAS No.: 100-20-9 | EC No.: 202-829-5

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1. Chemical Identification

Property	Specification
IUPAC Name	Benzene-1,4-dicarbonyl dichloride
Molecular Formula	C₈H₄Cl₂O₂
Molecular Weight	203.02 g/mol
Appearance	White to off-white flakes
Melting Point	79-81°C
Boiling Point	266°C
Density	1.34 g/cm³
pH	<0.5 (aqueous solution)

Synonyms:
TPC, Terephthaloyl dichloride, 1,4-Benzenedicarbonyl chloride

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2. Key Applications

Polymer Industry

• High-Performance Fibers:
  ✓ Aramid fibers (Kevlar®-type)
  ✓ Flame-retardant textiles
  ✓ Nylon reinforcement
• Specialty Plastics:
  ✓ Heat-resistant polyamides
  ✓ Engineering thermoplastics

Chemical Synthesis

• Pharmaceutical Intermediates:
  ✓ UV absorber production
  ✓ Drug synthesis
• Agrochemicals:
  ✓ Pesticide intermediate

Industrial Applications

• Dye and pigment manufacturing
• Crosslinking agent for resins

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3. Product Advantages

✔ High Reactivity – Excellent diacyl chloride for polycondensation
✔ Thermal Stability – Suitable for high-temperature processing
✔ Fiber Reinforcement – Enhances mechanical properties

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4. Physical & Chemical Properties

• Solubility:
  • Reacts with water/alcohols
  • Soluble in chlorinated solvents
• Moisture Sensitivity:
  • Hydrolyzes rapidly in moist air

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5. Handling & Storage

Parameter	Requirement
Storage Temp	<25°C (under inert gas)
Packaging	25kg moisture-proof drums
Shelf Life	12 months
Special Notes	Handle under dry nitrogen

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6. Safety Information

Danger!

• H314: Causes severe skin burns and eye damage
• H335: May cause respiratory irritation
• H290: May be corrosive to metals

Protective Measures:

• P280: Wear acid-resistant gloves/face shield
• P303+P361+P353: Skin contact wash procedure
• P305+P351+P338: Eye contact rinse protocol

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7. Quality Specifications

• Purity: ≥99% (GC)
• Acid Content: ≤0.5%
• Iron Content: ≤10 ppm

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