Description

Tetrachlorophthalic Anhydride is a halogenated aromatic anhydride of significant industrial importance, primarily valued as a key intermediate in the synthesis of high-performance polymers and pigments. Its fully chlorinated structure imparts excellent thermal stability and flame-retardant properties to final products, making it a critical raw material for demanding applications. This compound is essential for manufacturers in the plastics, dyes, and specialty chemical sectors seeking to enhance material performance and durability.

Application

• Flame Retardant Intermediate: A crucial precursor for synthesizing advanced flame-retardant additives used in engineering plastics, epoxy resins, and polyurethane foams.
• Polymer & Resin Production: Serves as a monomer or curing agent in the manufacture of high-temperature resistant polyimides, polyesters, and alkyd resins.
• Dye & Pigment Synthesis: Used in the production of chlorinated phthalocyanine pigments and other high-stability, vivid colorants for plastics and coatings.
• Pharmaceutical Intermediates: Acts as a building block in the synthesis of certain active pharmaceutical ingredients (APIs) and complex organic molecules.
• Epoxy Curing Agent: Functions as a hardener for epoxy resin systems, contributing to improved chemical and heat resistance in final composites.
• Chemical Research & Development: Employed in organic synthesis laboratories for introducing the tetrachlorophthaloyl moiety into target molecules.

Basic Information

Product Name	Tetrachlorophthalic Anhydride
CAS No.	117-08-8
Molecular Formula	C8Cl4O3
Molecular Weight	285.89 g/mol
Synonyms	1,2,4,5-Tetrachlorobenzene-3,6-dicarboxylic Anhydride; 3,4,5,6-Tetrachlorophthalic Anhydride; TCPA; Tetrachlorophthalic Acid Anhydride; Perchlorophthalic Anhydride; NSC 403096; 3,4,5,6-Tetrachloro-1,2-benzenedicarboxylic Anhydride
EINECS	204-171-5

Quality Control

Our Tetrachlorophthalic Anhydride is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including assay, melting point determination, and impurity profiling, to meet exacting customer specifications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and amines. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	254°C - 258°C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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