Description

Diethyl Terephthalate is a high-purity diester of terephthalic acid, serving as a critical monomer and intermediate in advanced polymer synthesis. Its controlled molecular structure is essential for achieving precise material properties in high-performance applications. This compound is primarily utilized by manufacturers in the polymer, specialty chemical, and pharmaceutical industries seeking consistent quality for their production processes.

Application

• Polymer Intermediate: A key monomer for the synthesis of specialized polyesters and copolyesters with enhanced thermal and mechanical properties.
• Plasticizer Production: Used in the manufacture of specific plasticizers to modify the flexibility and processing of polymers.
• Organic Synthesis: Serves as a versatile building block in organic chemistry for creating complex molecules, including pharmaceuticals and agrochemicals.
• Liquid Crystal Polymers (LCPs): An important precursor in the production of high-performance LCPs used in electronics and precision molding.
• Coating Resins: Employed in the formulation of high-durability and specialty coating resins.
• Laboratory Research: Used as a standard or reagent in R&D for material science and chemical studies.

Basic Information

Product Name	Diethyl Terephthalate
CAS No.	636-09-9
Molecular Formula	C12H14O4
Molecular Weight	222.24 g/mol
Synonyms	1,4-Benzenedicarboxylic Acid, Diethyl Ester; Diethyl Benzene-1,4-dicarboxylate; Ethyl Terephthalate; Terephthalic Acid Diethyl Ester; DET; Diethyl p-Phthalate; Ethyl 4-(ethoxycarbonyl)benzoate
EINECS	211-267-6

Quality Control

Our Diethyl Terephthalate is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is analyzed against stringent in-house specifications, which typically include identity confirmation, assay, and impurity profile checks. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 standard
Assay (HPLC)	≥ 99.0%
Melting Point	44 - 46 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm

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