Description

Ethylene Terephthalate Cyclic Heptamer is a well-defined, cyclic oligomer of polyethylene terephthalate (PET). This high-purity reference material is critical for analytical research, process development, and quality control within the polymer industry. It serves as an essential standard for characterizing PET materials, investigating degradation pathways, and developing advanced recycling technologies. Key industries that rely on this compound include polymer manufacturing, analytical laboratories, and research institutions focused on sustainable materials science.

Application

• Analytical Reference Standard: Used as a certified standard in HPLC, GPC, and mass spectrometry for the precise quantification and identification of cyclic oligomers in PET polymers and products.
• Polymer Research & Development: Essential for studying PET polymerization kinetics, thermal stability, and crystallization behavior to optimize manufacturing processes.
• Quality Control in PET Production: Monitors and controls the levels of cyclic oligomers in commercial PET resins, films, and fibers to ensure product consistency and performance.
• Chemical Recycling Studies: Acts as a model compound for developing and evaluating novel depolymerization and upcycling methods for PET waste streams.
• Additive & Modifier Studies: Investigated for its potential effects on the physical and mechanical properties of PET when incorporated as a minor component.
• Regulatory & Safety Testing: Supports migration studies and safety assessments for PET used in food-contact and pharmaceutical packaging applications.

Basic Information

Product Name	Ethylene Terephthalate Cyclic Heptamer
CAS No.	29668-12-0
Molecular Formula	C70H56O28
Molecular Weight	1296.18 g/mol
Synonyms	Cyclic PET Heptamer; PET Cyclic Heptamer; Poly(ethylene terephthalate) Cyclic Heptamer; 2,5-Furandione, dihydro-, 1,4-cyclohexanediybis(methylene) ester, polymer with 1,2-ethanediol and 1,4-benzenedicarboxylic acid, cyclic; Cyclic Oligomer of Polyethylene Terephthalate (n=7); Heptacyclic Ethylene Terephthalate; 1,4-Benzenedicarboxylic acid, polymer with 1,2-ethanediol and 3,4-dihydro-2,5-furandione, 1,4-cyclohexanediylbis(methylene) ester, cyclic
EINECS	Contact for details

Quality Control

Our Ethylene Terephthalate Cyclic Heptamer is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and structural confirmation via NMR and mass spectrometry, to ensure it meets the high standards required for research and analytical applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment.

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 stable under these conditions but should be kept away from excessive heat and moisture.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Related Substances (HPLC)	Total impurities ≤ 5.0%
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.