Description

4,5-Dichlorophthalic Acid Monosodium Salt is a high-purity, functionalized aromatic salt primarily used as a key synthetic intermediate. Its value lies in its dual functionality, offering both a carboxylic acid salt and reactive halogen substituents for further chemical transformations. This compound is essential for researchers and manufacturers in the pharmaceutical and advanced materials sectors, particularly for developing active pharmaceutical ingredients (APIs) and specialty polymers.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of complex drug molecules, especially those requiring a phthalic acid backbone with halogenated sites for further coupling reactions.
• Agrochemical Synthesis: Used in the production of advanced herbicides and pesticides where the dichloro-substituted aromatic structure provides specific biological activity.
• Polymer & Resin Modifier: Serves as a monomer or additive to introduce chlorine atoms and carboxylate groups into polymer chains, enhancing flame retardancy and adhesion properties.
• Dye & Pigment Manufacturing: Acts as a precursor for the synthesis of specialized chlorinated phthalocyanine dyes and high-performance pigments.
• Liquid Crystal & OLED Materials: Employed in the research and development of electronic display materials due to its rigid, substituted aromatic core.
• Chelating Agent Precursor: The functional groups make it a starting material for synthesizing ligands used in metal chelation and catalysis.

Basic Information

Item	Details
Product Name	4,5-Dichlorophthalic Acid Monosodium Salt
CAS No.	88389-96-2
Molecular Formula	C8H3Cl2NaO4
Molecular Weight	265.00 g/mol
Synonyms	Monosodium 4,5-dichlorophthalate; Sodium 4,5-dichlorophthalate; 4,5-Dichlorophthalic acid sodium salt; 4,5-Dichloro-1,2-benzenedicarboxylic acid monosodium salt; 1,2-Benzenedicarboxylic acid, 4,5-dichloro-, monosodium salt; 4,5-DCPAS
EINECS	Contact for details

Quality Control

Every batch of 4,5-Dichlorophthalic Acid Monosodium Salt is manufactured and tested under a strict quality management system. We ensure compliance with relevant industry standards for fine chemical intermediates. Comprehensive testing includes identity confirmation, purity assay, and impurity profiling. A Certificate of Analysis (COA) detailing all test results is provided with each 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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
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.