Description

3A,4,7,7A-Tetrahydroisobenzofuran-1,3-Dione is a versatile bicyclic anhydride compound with significant utility in advanced organic synthesis. Its reactive anhydride moiety makes it a valuable building block for creating polymers, resins, and complex pharmaceutical intermediates. This compound is particularly sought after by research and development teams in the pharmaceutical, agrochemical, and specialty polymer industries for constructing novel molecular architectures.

Application

• Pharmaceutical Intermediate: Serves as a key precursor in the synthesis of active pharmaceutical ingredients (APIs) and complex heterocyclic compounds.
• Polymer & Resin Modifier: Used as a curing agent or cross-linking agent in epoxy and polyester resin systems to enhance thermal and mechanical properties.
• Agrochemical Synthesis: Employed in the production of advanced herbicides, fungicides, and plant growth regulators.
• Fine Chemical Building Block: Utilized in organic laboratories for Diels-Alder reactions and other cycloaddition processes to create novel ring systems.
• Adhesive & Coating Formulations: Acts as a reactive diluent or hardener in high-performance adhesive and coating applications.
• Research & Development: A valuable tool for medicinal chemistry and material science research exploring new chemical entities.

Basic Information

Product Name	3A,4,7,7A-Tetrahydroisobenzofuran-1,3-Dione
CAS No.	13149-03-6
Molecular Formula	C8H8O3
Molecular Weight	152.15 g/mol
Synonyms	1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydro-; 3a,4,7,7a-Tetrahydro-1,3-isobenzofurandione; 4-Cyclohexene-1,2-dicarboxylic Anhydride; 1,2,3,6-Tetrahydrophthalic Anhydride; δ4-Tetrahydrophthalic Anhydride; 4-THPA; THPA; NSC 86531
EINECS	236-086-3

Quality Control

Our 3A,4,7,7A-Tetrahydroisobenzofuran-1,3-Dione is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including assay, impurity profiling, and identity confirmation, to ensure it meets the high standards required for industrial and research applications. A Certificate of Analysis (COA) detailing purity, physical characteristics, and test results is provided with every shipment.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can compromise product integrity. Keep away from incompatible materials such as strong bases, amines, and alcohols.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	98°C - 102°C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm

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