Description

Ethylene Terephthalate Cyclic Dimer is a high-purity chemical intermediate and a key structural unit in polyester chemistry. This compound is essential for researchers and manufacturers developing advanced polymeric materials and studying polymerization mechanisms. It is particularly valuable for the synthesis and modification of polyesters like PET (polyethylene terephthalate), where it serves as a model compound or a potential monomer. Industries involved in specialty polymers, performance plastics, and chemical research require this dimer for quality control, process development, and innovative material design.

Application

• Polymer Research & Development: Used as a model compound and monomer in the study of polyester synthesis, kinetics, and thermal properties.
• Specialty Polyester Production: A potential building block for creating novel copolyesters with enhanced characteristics such as clarity, barrier properties, or thermal stability.
• Analytical Reference Standard: Serves as a critical standard in chromatographic (e.g., HPLC, GC) analysis for quantifying oligomers and impurities in commercial PET resin and products.
• Chemical Intermediate: Employed in organic synthesis for creating specialized derivatives and fine chemicals.
• Quality Control & Assurance: Essential for manufacturers to monitor and control cyclic oligomer content in final polyester products, ensuring material consistency and performance.
• Additive & Modifier Studies: Investigated for its effects on crystallization behavior and processing of polyester blends and composites.

Basic Information

Product Name	Ethylene Terephthalate Cyclic Dimer
CAS No.	24388-68-9
Molecular Formula	C20H16O8
Molecular Weight	384.34 g/mol
Synonyms	Cyclic bis(2-hydroxyethyl) terephthalate; 1,4-Benzenedicarboxylic acid, 1,4-bis(2-hydroxyethyl) ester, cyclic; PET Cyclic Dimer; 2-Hydroxyethyl terephthalate cyclic dimer; Cyclic oligomer of PET; Ethylene terephthalate cyclic oligomer; Bis(2-hydroxyethyl) terephthalate, cyclic; Cyclic PET dimer
EINECS	Contact for details

Quality Control

Our Ethylene Terephthalate Cyclic Dimer is produced and handled under strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing key parameters such as assay, identity, and impurity profile. We support research and industrial applications requiring reliable and traceable reference materials, with specifications tailored to meet project-specific needs.

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 bases and incompatible materials such as strong oxidizing agents. For long-term storage, consider an inert atmosphere to maintain stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Related Substances (HPLC)	Individual impurity ≤ 1.0%

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