Description

4-Methylisobenzofuran-1,3-Dione CAS NO 30140-42-2 is a versatile organic compound belonging to the class of substituted phthalic anhydrides. This chemical serves as a critical synthetic intermediate and building block in the production of advanced materials and fine chemicals. It is primarily sought after by research and development laboratories, pharmaceutical manufacturers, and specialty chemical producers for creating polymers, dyes, and active pharmaceutical ingredients (APIs).

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of complex drug molecules and active pharmaceutical ingredients (APIs).
• Polymer & Resin Production: Used as a monomer or curing agent in the manufacture of specialty polyimides, epoxy resins, and alkyd resins for high-performance coatings.
• Dye & Pigment Synthesis: Serves as a core structure for producing advanced organic pigments and colorants.
• Agrochemicals: Intermediate in the development of modern pesticides and herbicides.
• Organic Synthesis & Research: Valuable building block for academic and industrial research in heterocyclic and medicinal chemistry.
• Electronic Chemicals: Potential use in the synthesis of materials for organic light-emitting diodes (OLEDs) and semiconductors.

Basic Information

Product Name	4-Methylisobenzofuran-1,3-Dione
CAS No.	30140-42-2
Molecular Formula	C9H6O3
Molecular Weight	162.14 g/mol
Synonyms	4-Methylphthalic Anhydride; 4-Methyl-1,3-isobenzofurandione; 4-Methyl-1,3-dihydro-2-benzofuran-1,3-dione; 1,3-Dioxo-4-methyl-1,3-dihydro-2-benzofuran; 4-Methylphthalic acid anhydride; 4-Methylbenzofuran-1,3-dione
EINECS	Contact for details

Quality Control

Our 4-Methylisobenzofuran-1,3-Dione is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for research and industrial synthesis. Certificates of Analysis (COA) documenting identity, purity, and impurity profiles are available upon request to support your quality assurance protocols.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent degradation from atmospheric moisture.

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	≤ 0.5%
Heavy Metals	< 20 ppm

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