Description

5-Isobenzofurancarboxylic Acid, 1,3-Dihydro-1,3-Dioxo-, Polymer With 1,2-Ethanediol is a high-purity polymeric chemical intermediate derived from the reaction of a phthalic anhydride derivative with ethylene glycol. This compound is valued for its consistent molecular structure and reactivity, which are critical for producing specialized polymers and coatings with enhanced performance characteristics. It serves as a key building block for manufacturers in the advanced materials, specialty resins, and performance chemical sectors seeking reliable and high-quality raw materials.

Application

• Synthesis of Polymeric Plasticizers for PVC and other polymers to improve flexibility and durability.
• Production of Alkyd Resins used in high-performance industrial and protective coatings.
• Intermediate for Unsaturated Polyester Resins (UPR) in fiberglass-reinforced composites for automotive and marine applications.
• Raw Material for Specialty Polyesters with specific thermal and chemical resistance properties.
• Component in Adhesive and Sealant Formulations to enhance bonding strength and environmental resistance.
• Research & Development of novel polymeric materials and functional additives.

Basic Information

Product Name	5-Isobenzofurancarboxylic Acid, 1,3-Dihydro-1,3-Dioxo-, Polymer With 1,2-Ethanediol
CAS No.	43011-20-7
Molecular Formula	(C9H4O5 · C2H6O2)n
Molecular Weight	Contact for details
Synonyms	Poly(ethylene glycol phthalate); Poly(ethylene phthalate); Ethylene Glycol Phthalate Polymer; Phthalic Anhydride-Ethylene Glycol Polymer; PEG Phthalate; 1,2-Ethanediol polymer with 1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid; Bis(2-hydroxyethyl) terephthalate oligomer; Terephthalic acid, polymer with ethylene glycol (related structure)
EINECS	Contact for details

Quality Control

Our production of 5-Isobenzofurancarboxylic Acid, 1,3-Dihydro-1,3-Dioxo-, Polymer With 1,2-Ethanediol adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. All materials undergo rigorous analytical testing, including assay, molecular weight distribution, and impurity profiling. Certificates of Analysis (COA) documenting full specifications are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality and performance.

Specification

Item	Specification
Appearance	White to off-white powder or granules
Identification (IR)	Conforms to reference spectrum
Assay (Polymer Content)	≥ 95.0%
Acid Value	≤ 5.0 mg KOH/g
Moisture (KF)	≤ 1.0%
Ash Content	≤ 0.5%
Molecular Weight (GPC, Mn)	Contact for details

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