Description

1,4-Benzenedicarbonyl Difluoride (9Ci) is a high-purity, reactive aromatic difluoride building block essential for advanced organic synthesis. This compound matters for its role as a key electrophilic monomer in the production of high-performance polymers and specialty chemicals. It is primarily needed by R&D chemists and process engineers in the pharmaceutical, agrochemical, and advanced materials industries for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: A critical precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds containing terephthaloyl motifs.
• Polymer Chemistry: Serves as a monomer for the production of high-performance polyesters, polyamides, and polyarylates, imparting thermal and chemical resistance.
• Agrochemical Synthesis: Used in the manufacture of advanced herbicides and pesticides where the difluoride group enhances biological activity and stability.
• Liquid Crystal & OLED Materials: A key building block for creating rigid-rod mesogens and electron-transport materials in display and lighting technologies.
• Crosslinking Agent: Employed in the production of specialty coatings, adhesives, and resins that require high crosslink density and durability.
• Chemical Research: Utilized in academic and industrial R&D for novel organic transformations, including nucleophilic aromatic substitution (SNAr) reactions.

Basic Information

Product Name	1,4-Benzenedicarbonyl Difluoride (9Ci)
CAS No.	1978-21-8
Molecular Formula	C8H4F2O2
Molecular Weight	170.11 g/mol
Synonyms	Terephthaloyl Difluoride; Terephthalic Acid Difluoride; 1,4-Difluorocarbonylbenzene; p-Phenylenedicarbonyl Difluoride; Benzene-1,4-dicarbonyl Difluoride; Terephthaloyl Fluoride; p-Difluorocarbonylbenzene; TFD
EINECS	217-842-6

Quality Control

Our 1,4-Benzenedicarbonyl Difluoride is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation by FT-IR and NMR, to ensure it meets the high standards required for sensitive synthetic applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled under anhydrous conditions to prevent hydrolysis. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	95 - 98 °C
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.