Description

4-Chloroisophthalic Acid is a versatile aromatic dicarboxylic acid derivative characterized by a chlorine substituent on the isophthalic acid backbone. This compound serves as a critical high-purity building block in advanced organic synthesis, enabling the introduction of both carboxylic acid functionality and halogenated aromaticity. It is primarily utilized by pharmaceutical, agrochemical, and polymer research sectors for developing active ingredients, ligands, and specialty monomers.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of novel active pharmaceutical ingredients (APIs) and drug candidates.
• Agrochemical Synthesis: Building block for herbicides, fungicides, and plant growth regulators requiring chlorinated aromatic cores.
• Polymer Chemistry: Monomer for producing high-performance polyamides, polyesters, and liquid crystal polymers (LCPs).
• Metal-Organic Frameworks (MOFs): Organic linker in the construction of porous coordination polymers for gas storage and catalysis.
• Ligand Synthesis: Preparation of chelating agents and catalysts for asymmetric synthesis and material science.
• Dyestuff & Pigment Intermediate: Used in the manufacture of complex organic colorants and specialty pigments.

Basic Information

Product Name	4-Chloroisophthalic Acid
CAS No.	2845-85-4
Molecular Formula	C8H5ClO4
Molecular Weight	200.57 g/mol
Synonyms	4-Chloro-1,3-benzenedicarboxylic Acid; Isophthalic Acid, 4-Chloro-; 4-Chlorobenzene-1,3-dicarboxylic Acid; 1,3-Benzenedicarboxylic acid, 4-chloro-; 4-CIPA
EINECS	220-643-5

Quality Control

Our 4-Chloroisophthalic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets the highest standards of purity and consistency. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided and available upon request, supporting compliance in regulated applications.

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 (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	285 - 295 °C
Loss on Drying	≤ 0.5%
Heavy Metals	≤ 20 ppm

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