Description

5,6-Dimethyl-3A,4,7,7A-Tetrahydroisobenzofuran-1,3-Dione is a versatile bicyclic anhydride derivative with the CAS number 5438-24-4. This compound serves as a critical high-purity synthetic intermediate and building block for advanced chemical synthesis. It is primarily sought by industries involved in the development of specialty polymers, pharmaceutical active ingredients, and fine chemicals where precise molecular architecture is required.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of complex drug molecules and active pharmaceutical ingredients (APIs).
• Polymer Chemistry: Used as a monomer or cross-linking agent for producing specialty polyimides, polyamides, and other high-performance polymers.
• Fine Chemical Synthesis: Serves as a versatile building block for creating complex organic molecules in research and development.
• Agrochemicals: Employed in the synthesis of advanced crop protection agents and herbicides.
• Dye and Pigment Industry: Acts as an intermediate for synthesizing specialized colorants and functional dyes.
• Material Science Research: Utilized in developing novel organic electronic materials and advanced composites.

Basic Information

Product Name	5,6-Dimethyl-3A,4,7,7A-Tetrahydroisobenzofuran-1,3-Dione
CAS No.	5438-24-4
Molecular Formula	C10H12O3
Molecular Weight	180.20 g/mol
Synonyms	5,6-Dimethyl-3a,4,7,7a-tetrahydro-2-benzofuran-1,3-dione; 5,6-Dimethyl-3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione; 3a,4,7,7a-Tetrahydro-5,6-dimethylisobenzofuran-1,3-dione; 5,6-Dimethyl-4,7-dihydroisobenzofuran-1,3-dione; 5,6-Dimethyl-3a,4,7,7a-tetrahydro-1H-isoindole-1,3(2H)-dione (tautomeric form); 5,6-Dimethyl-3a,4,7,7a-tetrahydrophthalic anhydride; 5,6-Dimethyl-Delta4-tetrahydrophthalic anhydride
EINECS	226-613-9

Quality Control

Our production of 5,6-Dimethyl-3A,4,7,7A-Tetrahydroisobenzofuran-1,3-Dione adheres to stringent quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity, GC for residual solvents, and spectroscopic identification (IR, NMR), to ensure it meets exacting specifications. Certificates of Analysis (COA) detailing all test results are provided to guarantee traceability, consistency, and compliance with your project requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep away from strong bases, strong oxidizing agents, and moisture. For long-term storage, consider an inert atmosphere to preserve product integrity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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