Description

1,4-Benzenedicarboxylic Acid 1-Ethyl 4-Methyl Ester is a high-purity diester derivative of terephthalic acid, serving as a versatile and critical chemical intermediate. Its value lies in providing a controlled, reactive platform for the synthesis of more complex molecules, particularly in polymer and specialty chemical manufacturing. This compound is essential for R&D chemists and production engineers in the pharmaceutical, agrochemical, and advanced materials sectors who require precise building blocks for product development.

Application

• Polymer & Plasticizer Intermediate: A key monomer or modifier in the production of specialty polyesters and polymeric plasticizers, enhancing material flexibility and performance.
• Pharmaceutical Synthesis: Used as a protected or functionalized intermediate in the multi-step synthesis of active pharmaceutical ingredients (APIs) and drug candidates.
• Agrochemical Manufacturing: Serves as a precursor in the synthesis of advanced herbicides, pesticides, and plant growth regulators.
• Liquid Crystal & OLED Materials: Acts as a core building block for creating aromatic esters used in electronic display technologies and organic semiconductors.
• Organic Synthesis & R&D: A valuable reagent in academic and industrial laboratories for constructing complex organic frameworks and exploring new chemical reactions.
• Dye & Pigment Industry: Employed in the synthesis of specialized dyes and pigments, contributing to color stability and properties.

Basic Information

Item	Detail
Product Name	1,4-Benzenedicarboxylic Acid 1-Ethyl 4-Methyl Ester
CAS No.	22163-52-6
Molecular Formula	C12H14O4
Molecular Weight	222.24 g/mol
Synonyms	Monoethyl Monomethyl Terephthalate; Ethyl Methyl Terephthalate; 1-Ethyl 4-Methyl Benzene-1,4-dicarboxylate; Terephthalic Acid Ethyl Methyl Ester; Ethyl Methyl 1,4-Benzenedicarboxylate; EMT; Methyl Ethyl Terephthalate; 4-(Ethoxycarbonyl)benzoic Acid Methyl Ester
EINECS	Contact for details

Quality Control

Our production of 1,4-Benzenedicarboxylic Acid 1-Ethyl 4-Methyl Ester adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including chromatography and spectroscopy, to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting all critical parameters are available upon request, providing full traceability and supporting your quality assurance processes.

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). Keep away from strong oxidizing agents, strong acids, and strong bases.

Specification

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

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