Terephthaloyl chloride is an important aromatic diacid chloride widely used in high-performance polymer synthesis and fine chemical industries.
Terephthaloyl Chloride 100-20-9 appears as white crystalline flakes or needle-like crystals, with strong reactivity toward water and alcohols, making it a key intermediate for advanced materials.
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CAS No.: 100-20-9
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Molecular Formula: C8H4Cl2O2
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Appearance: White crystalline flakes or needles
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Melting Point: 83–84°C
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Solubility: Insoluble in water, soluble in organic solvents
As a professional China manufacturer, supplier, and factory, AECOCHEM offers customized specifications, stable quality, and reliable global supply to meet industrial production needs.
Specification:
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Items
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Specification
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Appearance
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White flake
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Melting point
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82-83℃
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Purity
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99.9% min
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Product Package:20kg/fiber drum or50kg/UNplastic drum
Some photos of shipment:

Key Applications
Terephthaloyl Chloride 100-20-9 is widely used in the following industries:
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Polymer Production: Key raw material for polyamides (aramid fibers), polyesters, and high-performance engineering plastics
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Synthetic Fibers: Used in the production of heat-resistant and flame-retardant fibers
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Coatings & Resins: Applied in specialty resins, films, and advanced materials
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Fine Chemicals: Intermediate for pharmaceuticals, agrochemicals, dyes, and pigments
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UV Absorbers & Additives: Used in light stabilizers and crosslinking agents
Key Advantages
Terephthaloyl Chloride 100-20-9 offers several performance benefits:
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High Reactivity: Efficient acylation agent for polymer synthesis
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Versatile Applications: Suitable for multiple industries including chemicals and materials
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Thermal Stability: Ideal for high-temperature resistant materials
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Consistent Quality: High purity ensures stable downstream performance
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Custom Supply: Available in different packaging and specifications
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Industrial Reliability: Proven performance in large-scale production
FAQ
What is the use of 100-20-9?
Terephthaloyl Chloride 100-20-9 is mainly used as a key intermediate in the production of aramid fibers, polyesters, and other high-performance polymers, as well as in pharmaceuticals, dyes, and agrochemicals.
Is Terephthaloyl Chloride harmful?
Terephthaloyl Chloride 100-20-9 is reactive and can release corrosive substances when exposed to moisture. Proper handling, protective equipment, and controlled storage conditions are required to ensure safe use in industrial environments.
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