Description

Homophthalic Anhydride is a versatile and reactive cyclic anhydride used as a key building block in organic synthesis. Its unique structure makes it a valuable precursor for the synthesis of complex heterocyclic compounds and active pharmaceutical ingredients (APIs). This high-purity intermediate is essential for research and production in the pharmaceutical, agrochemical, and specialty chemical industries, where precise molecular construction is critical.

Application

• Pharmaceutical Intermediates: A crucial starting material for synthesizing various heterocyclic compounds, including quinolones, isoquinolines, and other fused-ring systems with potential biological activity.
• Agrochemical Synthesis: Used in the production of advanced crop protection agents and herbicides, leveraging its reactivity to create novel molecular scaffolds.
• Polymer Chemistry: Serves as a monomer or cross-linking agent in the synthesis of specialty polymers, polyimides, and resins, contributing to thermal stability and specific material properties.
• Dye and Pigment Manufacturing: Acts as a precursor in the synthesis of complex organic dyes and pigments, particularly phthalocyanine derivatives.
• Ligand and Catalyst Development: Employed in the design and synthesis of novel chiral ligands and organocatalysts for asymmetric synthesis.
• Research & Development: A valuable reagent in academic and industrial R&D labs for exploring new synthetic methodologies and creating compound libraries for screening.

Basic Information

Product Name	Homophthalic Anhydride
CAS No.	703-59-3
Molecular Formula	C9H6O3
Molecular Weight	162.14 g/mol
Synonyms	2-Carboxybenzeneacetic acid anhydride; 2-(Carboxymethyl)benzoic acid anhydride; 3,4-Dihydro-1H-2-benzopyran-1,3-dione; Homophthalic acid anhydride; 1,3-Dioxo-1,3-dihydro-2-benzofuran-5-acetic acid; o-(Carboxymethyl)benzoic anhydride; 2-Benzofurancarboxylic acid, 1,3-dihydro-1,3-dioxo-
EINECS	211-875-7

Quality Control

Our Homophthalic Anhydride is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for synthetic applications. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and consistency for our global B2B clients.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 maintain stability. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	128°C - 132°C
Loss on Drying	≤ 0.5%
Heavy Metals	≤ 20 ppm

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