Description

4-Methylphthalic Acid is a versatile aromatic dicarboxylic acid derivative, serving as a critical building block in advanced organic synthesis. Its value lies in its bifunctional structure, which allows for the creation of complex polymers, dyes, and pharmaceutical intermediates with tailored properties. This compound is essential for manufacturers and R&D teams in the pharmaceutical, agrochemical, and specialty polymer industries seeking to develop high-performance materials and active ingredients.

Application

• Pharmaceutical Intermediates: Key precursor in the synthesis of active pharmaceutical ingredients (APIs) and complex drug molecules.
• Polymer & Resin Production: Monomer for manufacturing specialty polyesters, polyamides, and alkyd resins, enhancing material durability and thermal stability.
• Agrochemical Synthesis: Building block for creating advanced herbicides, fungicides, and plant growth regulators.
• Dye & Pigment Manufacturing: Intermediate in the production of high-performance organic pigments and dyes for textiles and plastics.
• Liquid Crystal & OLED Materials: Used in the synthesis of organic electronic materials for display and lighting technologies.
• Corrosion Inhibitors: Component in formulations for metal surface treatment and protective coatings.
• Research & Development: Valuable reagent in academic and industrial laboratories for exploring new synthetic pathways.
• Crosslinking Agent: Imparts improved mechanical strength and chemical resistance in epoxy and other thermosetting systems.

Basic Information

Product Name	4-Methylphthalic Acid
CAS No.	4316-23-8
Molecular Formula	C9H8O4
Molecular Weight	180.16 g/mol
Synonyms	4-Methylphthalic Acid; 4-Methylbenzene-1,2-dicarboxylic Acid; 1,2-Benzenedicarboxylic acid, 4-methyl-; 4-Methyl-1,2-benzenedicarboxylic Acid; 4-Methylphthalic acid (CAS 4316-23-8); 4-Methyl-o-phthalic Acid; 4-Methylphthalic acid, 98%; 4-Methylphthalic acid, 95%
EINECS	224-341-9

Quality Control

Our 4-Methylphthalic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC and titration methods, to ensure high purity and consistency that meets the demanding requirements of industrial and research applications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee traceability and compliance.

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 in a dry environment to prevent degradation and clumping. Keep away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Melting Point	165 - 170 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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