Description

2,5-Dimethylterephthalic Acid is a high-purity aromatic dicarboxylic acid derivative, serving as a critical building block in advanced polymer synthesis. Its value lies in the introduction of methyl substituents on the terephthalic acid backbone, which modifies polymer crystallinity, thermal properties, and solubility. This compound is essential for R&D and production in industries such as specialty polyesters, liquid crystal polymers (LCPs), and high-performance engineering plastics.

Application

• Monomer for Specialty Polyesters and Copolyesters: Used to synthesize modified PET (polyethylene terephthalate) and PBT (polybutylene terephthalate) with enhanced properties like reduced crystallinity for improved clarity or dyeability.
• Liquid Crystal Polymer (LCP) Production: Acts as a key monomer to create aromatic polyesters with exceptional thermal stability, chemical resistance, and dimensional precision for electronics and automotive components.
• High-Performance Engineering Plastics: Incorporated into polyamides (nylons) and polyarylates to improve heat deflection temperature and mechanical strength.
• Organic Synthesis Intermediate: Utilized in pharmaceutical and agrochemical research to construct complex molecular architectures.
• Coating and Resin Modifier: Enhances the durability, adhesion, and thermal properties of industrial and powder coatings.
• Advanced Material Research: Serves as a precursor for metal-organic frameworks (MOFs) and other functional materials.

Basic Information

Product Name	2,5-Dimethylterephthalic Acid
CAS No.	6051-66-7
Molecular Formula	C10H10O4
Molecular Weight	194.18 g/mol
Synonyms	2,5-Dimethyl-1,4-benzenedicarboxylic Acid; 2,5-Dimethyl-p-phthalic Acid; Terephthalic Acid, 2,5-Dimethyl-; DMT Acid; 2,5-DMT; 2,5-Dimethylbenzene-1,4-dicarboxylic Acid; 1,4-Benzenedicarboxylic Acid, 2,5-Dimethyl-
EINECS	227-974-6

Quality Control

Our 2,5-Dimethylterephthalic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance.

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 after opening to prevent moisture absorption, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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