Description

3,6-Dichlorotrimellitic Anhydride is a high-purity, halogenated aromatic anhydride derivative. This compound serves as a critical advanced intermediate for synthesizing high-performance polymers and specialty chemicals. It is primarily utilized by R&D chemists and production engineers in the pharmaceutical, agrochemical, and polymer industries to develop products with enhanced thermal stability and specific functional properties.

Application

• Polymer Synthesis: Key monomer for producing high-temperature resistant polyimides and polyamide-imides used in electronics and aerospace.
• Pharmaceutical Intermediates: Building block for the synthesis of active pharmaceutical ingredients (APIs), particularly those requiring a rigid, halogenated aromatic core.
• Agrochemical Intermediates: Precursor in the manufacture of herbicides and fungicides, where the dichloro substitution pattern is crucial for bioactivity.
• Dye and Pigment Manufacturing: Intermediate for creating specialized colorants with improved lightfastness and thermal properties.
• Epoxy Resin Modifiers: Used to introduce chlorinated aromatic structures into epoxy systems to enhance flame retardancy.
• Crosslinking Agent: Functions as a crosslinker in specialty coatings and adhesives to improve chemical resistance and durability.
• Liquid Crystal Polymers (LCPs): Aromatic monomer component for high-performance LCPs used in precision molded components.

Basic Information

Product Name	3,6-Dichlorotrimellitic Anhydride
CAS No.	81742-10-1
Molecular Formula	C9H2Cl2O5
Molecular Weight	261.02 g/mol
Synonyms	3,6-Dichloro-1,2,4-benzenetricarboxylic acid 1,2-anhydride; 3,6-Dichlorobenzene-1,2,4-tricarboxylic acid 1,2-anhydride; 3,6-Dichlorotrimellitic acid anhydride; Dichlorotrimellitic anhydride; 1,2,4-Benzenetricarboxylic acid, 3,6-dichloro-, 1,2-anhydride; 3,6-DCTA
EINECS	Contact for details

Quality Control

Our 3,6-Dichlorotrimellitic Anhydride is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all relevant specifications are provided with each shipment and are available upon request to support your quality assurance protocols.

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 affect product quality. Keep away from incompatible materials such as strong bases and amines.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	195 - 205 °C
Loss on Drying	≤ 0.5%
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.