Description

1,4-Cyclohexadiene-1,2-Dicarboxylic Anhydride is a reactive, unsaturated cyclic anhydride with a unique conjugated diene structure. This compound serves as a versatile chemical intermediate, particularly valuable for its ability to undergo Diels-Alder reactions and other addition chemistries to form complex polycyclic frameworks. It is primarily sought by research and development laboratories in the pharmaceutical and advanced materials sectors for synthesizing novel compounds, polymers, and specialty chemicals.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of complex drug molecules and active pharmaceutical ingredients (APIs) via cycloaddition reactions.
• Polymer & Resin Modification: Used as a curing agent or co-monomer to introduce rigidity and thermal stability into epoxy, polyester, or alkyd resins.
• Organic Synthesis & Research: A valuable dienophile in Diels-Alder reactions for constructing bicyclic and polycyclic organic compounds in academic and industrial R&D.
• Specialty Chemicals Production: Intermediate in the manufacture of dyes, pigments, corrosion inhibitors, and other high-value fine chemicals.
• Adhesive & Coating Formulations: Imparts enhanced cross-linking density and performance characteristics in high-performance adhesive and coating systems.

Basic Information

Product Name	1,4-Cyclohexadiene-1,2-Dicarboxylic Anhydride
CAS No.	4773-89-1
Molecular Formula	C8H6O3
Molecular Weight	150.13 g/mol
Synonyms	1,4-Cyclohexadiene-1,2-dicarboxylic acid anhydride; 4-Cyclohexene-1,2-dicarboxylic anhydride; 3a,4,7,7a-Tetrahydroisobenzofuran-1,3-dione; 1,2,3,6-Tetrahydrophthalic anhydride; 1,4-Dihydrophthalic anhydride; δ4-Tetrahydrophthalic anhydride; NSC 66480
EINECS	225-320-2

Quality Control

Our 1,4-Cyclohexadiene-1,2-Dicarboxylic Anhydride is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide detailed Certificates of Analysis (COA) with key parameters including assay, moisture content, and identification. Our quality systems support compliance with cGMP and ISO standards for reliable supply to regulated industries.

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). This product is hygroscopic (moisture-sensitive) and must be kept under dry, inert conditions to prevent hydrolysis and degradation. Keep away from strong bases, oxidizing agents, and sources of heat.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	97 - 102 °C
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%

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