Description

Ethylene Terephthalate Cyclic Tetramer is a high-purity cyclic oligomer of polyethylene terephthalate (PET). This compound serves as a critical model compound and a high-value intermediate in advanced polymer research and specialty material synthesis. It is essential for researchers and manufacturers in the polymer industry seeking to study PET degradation mechanisms, develop novel catalysts, or synthesize specialized copolymers with tailored properties.

Application

• Polymer Research & Development: Used as a model compound for studying the kinetics, mechanisms, and catalysis of PET polymerization and depolymerization (chemical recycling).
• Specialty Monomer Synthesis: Acts as a key intermediate for the synthesis of novel, high-performance polyesters and copolymers with unique thermal or mechanical properties.
• Analytical Reference Standard: Serves as a certified reference material (CRM) for the identification and quantification of cyclic oligomers in PET resins, films, and food-contact materials via techniques like HPLC and LC-MS.
• Additive Manufacturing: Investigated as a precursor for developing advanced resins in 3D printing, targeting applications requiring high chemical resistance and thermal stability.
• Catalyst Screening: Employed in high-throughput screening of novel catalysts for ring-opening polymerization (ROP) to create new polymeric materials.
• Surface Modification: Utilized in the surface treatment of materials to impart specific functional groups derived from its terephthalate structure.

Basic Information

Product Name	Ethylene Terephthalate Cyclic Tetramer
CAS No.	16104-96-4
Molecular Formula	C40H32O16
Molecular Weight	768.67 g/mol
Synonyms	Cyclic PET Tetramer; 2,5-Furandione, dihydro-, 1,4-bis(2-hydroxyethyl) ester tetramer; Tetrameric Cyclic Oligomer of Polyethylene Terephthalate; PET Cyclic Tetramer; 1,4-Bis(2-hydroxyethyl) terephthalate cyclic tetramer; Cyclic Oligo(ethylene terephthalate) tetramer; COET tetramer; Cyclic (PET)4
EINECS	Contact for details

Quality Control

Our Ethylene Terephthalate Cyclic Tetramer is produced and handled under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity and structural confirmation via NMR and IR spectroscopy, to ensure it meets the high standards required for research and industrial applications. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming batch-specific identity, purity, and impurity profiles.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). The product is moisture-sensitive; keep the container tightly sealed in a dry environment to prevent hydrolysis.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Purity (HPLC)	≥ 95.0% (Area %)
Related Substances (HPLC)	Total related cyclic oligomers ≤ 5.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%

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