Description

Exo-3,6-Epoxy-1,2,3,6-tetrahydrophthalic anhydride is a high-purity, reactive bicyclic anhydride and epoxide used as a key building block in advanced polymer synthesis. This compound is valued for its ability to introduce both anhydride and epoxide functionalities, enabling the creation of materials with enhanced thermal stability, mechanical strength, and chemical resistance. It is primarily sought by R&D and production teams in the pharmaceutical intermediates, epoxy resin curing agents, and specialty polymer sectors.

Application

• Epoxy Resin Curing Agent & Modifier: Acts as a reactive intermediate to produce high-performance curing agents, improving the heat resistance and mechanical properties of final epoxy formulations.
• Pharmaceutical Intermediate: Serves as a critical synthon in the synthesis of complex drug molecules and active pharmaceutical ingredients (APIs).
• Polymer Crosslinking Agent: Used in the production of cross-linked polymers for coatings, adhesives, and composites requiring superior durability.
• Synthesis of Polyimide Precursors: A key monomer for manufacturing polyimide resins and films, which are essential in electronics and aerospace applications.
• Organic Synthesis Reagent: Employed in Diels-Alder reactions and other cycloadditions to construct complex polycyclic structures in fine chemical production.
• Thermoset Plastic Modifier: Incorporated to enhance the thermal and chemical stability of various thermosetting plastics.

Basic Information

Product Name	Exo-3,6-Epoxy-1,2,3,6-tetrahydrophthalic anhydride
CAS No.	6766-44-5
Molecular Formula	C8H8O4
Molecular Weight	168.15 g/mol
Synonyms	1,2,3,6-Tetrahydro-3,6-epoxyphthalic anhydride; 4,7-Epoxyisobenzofuran-1,3-dione, 4,4a,7,7a-tetrahydro-; 3,6-Epoxy-1,2,3,6-tetrahydrophthalic anhydride; exo-3,6-Epoxy-δ4-tetrahydrophthalic anhydride; Tetrahydro-3,6-epoxyphthalic anhydride; Nadic anhydride, partially hydrogenated; EPAN; Contact for details on additional trade names.
EINECS	229-826-6

Quality Control

Our Exo-3,6-Epoxy-1,2,3,6-tetrahydrophthalic anhydride is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity and identity, supporting its use in sensitive applications like pharmaceutical synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	118 - 122 °C
Loss on Drying	≤ 0.5%
Heavy Metals	≤ 10 ppm

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