Description

1,3-Dihydro-1-Oxo-4-Isobenzofurancarboxylic Acid is a high-purity organic compound serving as a critical building block in advanced chemical synthesis. Its value lies in its unique isobenzofuranone-carboxylic acid structure, which enables the construction of complex molecules for pharmaceutical and agrochemical research. This intermediate is essential for manufacturers and R&D laboratories developing active ingredients, fine chemicals, and novel materials.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs) and novel drug candidates.
• Agrochemical Synthesis: Building block for developing advanced herbicides, fungicides, and plant growth regulators.
• Fine Chemical Production: Used in the manufacture of specialty chemicals, dyes, and pigments.
• Material Science Research: Serves as a monomer or modifying agent in the development of polymers and advanced materials.
• Academic & Industrial R&D: A valuable reagent for organic synthesis and methodological studies in chemistry laboratories.

Basic Information

Product Name	1,3-Dihydro-1-Oxo-4-Isobenzofurancarboxylic Acid
CAS No.	4792-27-2
Molecular Formula	C9H6O4
Molecular Weight	178.14 g/mol
Synonyms	4-Carboxyphthalide; 4-Carboxy-1(3H)-isobenzofuranone; 1-Oxo-1,3-dihydro-isobenzofuran-4-carboxylic acid; Phthalide-4-carboxylic acid; 4-Phthalidecarboxylic Acid; 4-Carboxyphthalimide (common misnomer); 1,3-Dihydro-1-oxo-4-isobenzofurancarboxylic acid; 4-CP
EINECS	Contact for details

Quality Control

Our 1,3-Dihydro-1-Oxo-4-Isobenzofurancarboxylic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC, NMR, and IR spectroscopy, to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting all specifications are available upon request, supporting compliance with cGMP and ISO 9001 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 a controlled room temperature (15-25°C). 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%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 10 ppm

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