Description

3,6-Dichlorophthalic Acid is a key halogenated aromatic dicarboxylic acid derivative, serving as a versatile and high-value synthetic intermediate. Its primary commercial value lies in its role as a precursor for the synthesis of advanced materials and functional chemicals, where the chlorine substituents offer reactive sites for further modification. This compound is essential for manufacturers and R&D teams in the agrochemical, pharmaceutical, and specialty polymer industries seeking to develop new active ingredients or performance additives.

Application

• Agrochemical Intermediate: A critical building block for synthesizing modern herbicides, fungicides, and plant growth regulators, where the dichloro-substituted phthalic acid core imparts specific biological activity.
• Pharmaceutical Synthesis: Used in the preparation of active pharmaceutical ingredients (APIs) and key pharmacophores, particularly in the development of compounds with anti-inflammatory or antimicrobial properties.
• Polymer & Material Science: Acts as a monomer or modifier in the production of high-performance polyimides, polyesters, and liquid crystal polymers, enhancing thermal stability and chemical resistance.
• Dye & Pigment Manufacturing: Serves as a precursor for the synthesis of complex organic pigments and colorants, contributing to color fastness and stability.
• Organic Synthesis & Research: A valuable reagent in academic and industrial R&D for constructing complex heterocyclic compounds and as a model substrate in catalytic studies.

Basic Information

Product Name	3,6-Dichlorophthalic Acid
CAS No.	16110-99-9
Molecular Formula	C8H4Cl2O4
Molecular Weight	235.02 g/mol
Synonyms	3,6-Dichlorobenzene-1,2-dicarboxylic Acid; 3,6-Dichloro-1,2-benzenedicarboxylic Acid; NSC 403697; 1,2-Benzenedicarboxylic acid, 3,6-dichloro-; Phthalic acid, 3,6-dichloro-
EINECS	240-281-5

Quality Control

Our 3,6-Dichlorophthalic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity and impurity profiles. A Certificate of Analysis (COA) detailing results for assay, identity, and related substances is provided with every shipment, ensuring full traceability and compliance with your internal quality standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong bases, oxidizing agents, and sources of heat.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	215 - 220 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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