Description

4-Chlorotetrahydrophthalic Anhydride is a versatile halogenated cyclic anhydride intermediate of significant industrial importance. Its reactive anhydride group and chlorine substituent make it a valuable building block for synthesizing advanced polymers, resins, and fine chemicals. This compound is particularly essential for manufacturers in the polymer, epoxy curing agent, and specialty chemical sectors seeking to introduce chlorinated functionality and enhanced thermal properties into their products.

Application

• Epoxy Resin Curing Agent: Acts as a reactive intermediate to produce halogenated acid anhydride curing agents, imparting improved flame retardancy and thermal stability to cured epoxy systems.
• Polymer Modification: Used in the synthesis of polyimide precursors, polyester resins, and alkyd resins to modify properties like solubility, thermal resistance, and adhesion.
• Fine Chemical Synthesis: Serves as a key chiral building block or intermediate in the pharmaceutical and agrochemical industries for constructing complex molecular architectures.
• Plasticizer & Stabilizer Production: Employed in the manufacture of specialized plasticizers and stabilizers for PVC and other polymers.
• Cross-linking Agent: Functions as a cross-linking agent in coatings, adhesives, and encapsulants to enhance network density and performance.
• Research & Development: Utilized in academic and industrial R&D for exploring new materials, such as advanced composites and high-performance engineering plastics.

Basic Information

Product Name	4-Chlorotetrahydrophthalic Anhydride
CAS No.	14737-08-7
Molecular Formula	C8H7ClO3
Molecular Weight	186.59 g/mol
Synonyms	4-Chloro-1,2,3,6-tetrahydrophthalic anhydride; 4-Chloro-δ4-tetrahydrophthalic anhydride; 4-Chloro-4-cyclohexene-1,2-dicarboxylic anhydride; 1-Chloro-3,6-endoxo-δ4-tetrahydrophthalic anhydride; 4-Chlorotetrahydrophthalic acid anhydride; 4-Chloro-1,2,3,6-tetrahydro-1,2-benzenedicarboxylic anhydride; Tetrahydro-4-chlorophthalic anhydride
EINECS	238-810-9

Quality Control

Our 4-Chlorotetrahydrophthalic Anhydride is manufactured under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including assay, impurity profile, and physical characteristic checks, to ensure it meets precise specifications for industrial applications. Certificates of Analysis (COA) documenting purity, identity, and other critical parameters are available upon request to support your quality assurance and regulatory compliance needs.

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). This product is hygroscopic (moisture-sensitive) and should be kept under dry conditions to prevent hydrolysis of the anhydride functionality. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	95 - 105 °C
Loss on Drying	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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