Description

3-Methylphthalic Anhydride is a versatile organic intermediate characterized by its reactive anhydride functional group. This compound is essential for the synthesis of advanced polymers, dyes, and pharmaceutical ingredients, offering a critical building block for high-value chemical manufacturing. It is particularly valuable for industries such as polymer engineering, specialty chemicals, and agrochemical research, where its unique substitution pattern enables the creation of tailored materials with specific performance characteristics.

Application

• Polymer & Resin Synthesis: A key monomer for producing modified alkyd, polyester, and epoxy resins, enhancing thermal stability and mechanical properties.
• Pharmaceutical Intermediates: Serves as a crucial precursor in the synthesis of active pharmaceutical ingredients (APIs) and complex organic molecules.
• Dye & Pigment Manufacturing: Used in the production of high-performance pigments and optical brighteners for plastics and coatings.
• Agrochemicals: Employed as an intermediate in the synthesis of herbicides, fungicides, and plant growth regulators.
• Liquid Crystal & OLED Materials: Acts as a building block for advanced electronic materials requiring specific aromatic structures.
• Crosslinking Agent: Functions as a crosslinker in polymer systems to improve hardness and chemical resistance.
• Research & Development: A valuable reagent in organic synthesis for academic and industrial R&D laboratories.
• Specialty Surfactants: Used to synthesize surfactants with specific hydrophobic characteristics.

Basic Information

Product Name	3-Methylphthalic Anhydride
CAS No.	4792-30-7
Molecular Formula	C9H6O3
Molecular Weight	162.14 g/mol
Synonyms	3-Methylphthalic anhydride; 3-Methyl-1,3-isobenzofurandione; 3-Methyl-1,2-benzenedicarboxylic anhydride; 3-Methylphthalic acid anhydride; 3-Methylphthalic acid cyclic anhydride; 3-Methyl-1,2-benzenedicarboxylic acid anhydride; 3-Methylphthalic Anhydride (3-MPA); 3-Methyl-1,3-dihydro-2-benzofuran-1,3-dione
EINECS	225-343-5

Quality Control

Our 3-Methylphthalic Anhydride is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including assay, impurity profiling, and identity confirmation. A Certificate of Analysis (COA) detailing all specifications and test results is provided with every shipment. We are committed to meeting the stringent requirements of industrial and research applications.

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 conditions to prevent hydrolysis. Keep away from strong bases, oxidizing agents, and sources of ignition.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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