Description

4-Acetoxyphthalicanhydride is a versatile and high-purity organic intermediate of significant importance in advanced chemical synthesis. This compound matters for its role as a key building block in the production of complex molecules, particularly in the pharmaceutical and specialty chemical sectors. Industries that require precise and reliable synthetic pathways, such as pharmaceutical R&D, agrochemical manufacturing, and materials science, are the primary users of this high-value chemical.

Application

• Pharmaceutical Intermediate: A critical precursor in the synthesis of active pharmaceutical ingredients (APIs), especially for compounds with complex fused-ring structures.
• Agrochemical Synthesis: Used in the development of advanced herbicides, fungicides, and plant growth regulators requiring specific anhydride functionalities.
• Polymer & Material Science: Serves as a monomer or cross-linking agent for creating specialized polyimides, epoxy resins, and high-performance polymers with enhanced thermal stability.
• Dye & Pigment Manufacturing: Acts as an intermediate in the production of organic pigments and complex dyes, contributing to color fastness and stability.
• Research & Development: Essential for academic and industrial R&D labs exploring new synthetic methodologies and novel chemical entities.
• Fine Chemical Production: Employed in the multi-step synthesis of complex fine chemicals and other specialty organic compounds.

Basic Information

Product Name	4-Acetoxyphthalicanhydride
CAS No.	27550-63-6
Molecular Formula	C₁₀H₆O₅
Molecular Weight	206.15 g/mol
Synonyms	4-Acetoxyphthalic Anhydride; 4-(Acetyloxy)phthalic Anhydride; 1,3-Isobenzofurandione, 4-(acetyloxy)-; 4-Acetoxy-1,3-isobenzofurandione; Phthalic Anhydride, 4-acetoxy-; 4-Acetoxybenzene-1,2-dicarboxylic Anhydride; 4-Hydroxyphthalic Anhydride Acetate
EINECS	Contact for details

Quality Control

Our 4-Acetoxyphthalicanhydride is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including HPLC, NMR, and IR spectroscopy, to confirm identity and purity. Certificates of Analysis (COA) detailing all specifications are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture. Keep away from incompatible materials such as strong bases and amines.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Heavy Metals	≤ 20 ppm

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