Description

Dichlorophthalic Anhydride is a halogenated aromatic anhydride derivative, serving as a critical high-purity intermediate in advanced chemical synthesis. Its value lies in its reactive anhydride group and chlorine substituents, which enable precise modifications to polymer backbones and pharmaceutical molecules. This compound is essential for manufacturers in the polymer, agrochemical, and specialty chemical industries seeking to develop flame-retardant materials, high-performance resins, and active pharmaceutical ingredients (APIs).

Application

• Polymer Modification: Key monomer for synthesizing halogenated polyimides and polyester resins with enhanced flame retardancy and thermal stability.
• Pharmaceutical Intermediates: Used in the synthesis of complex drug molecules, where its dichloro-substituted aromatic ring serves as a core building block.
• Agrochemical Synthesis: Intermediate in the production of advanced herbicides and fungicides, contributing to the active moiety's biological activity.
• Dye and Pigment Manufacturing: Acts as a precursor for creating specialized, light-fast organic pigments and dyes.
• Epoxy Curing Agents: Employed in the formulation of specialty epoxy hardeners for high-performance composite materials.
• Laboratory Research: Serves as a versatile reagent in organic chemistry R&D for constructing complex heterocyclic compounds.

Basic Information

Product Name	Dichlorophthalic Anhydride
CAS No.	52005-46-6
Molecular Formula	C8H2Cl2O3
Molecular Weight	217.00 g/mol
Synonyms	3,6-Dichlorophthalic Anhydride; 4,5-Dichlorophthalic Anhydride; Dichlorophthalic Acid Anhydride; 1,3-Dioxo-1,3-dihydroisobenzofuran-4,7-dicarbonyl chloride (incorrect but common misnomer); DCPA (abbreviation); NSC 403119; 4,7-Dichloroisobenzofuran-1,3-dione
EINECS	Contact for details

Quality Control

Our Dichlorophthalic Anhydride is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation by IR spectroscopy, to ensure it meets exacting specifications for industrial and research use. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical parameters is provided with every shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can compromise product integrity. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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