Description

5-Methylisophthalic Acid is a high-purity aromatic dicarboxylic acid derivative, serving as a critical building block in advanced organic synthesis. Its value lies in providing a methyl-substituted isophthalic acid core, enabling precise modification of polymer backbones and fine chemical structures for enhanced performance. This compound is essential for R&D and production teams in the pharmaceutical, agrochemical, and specialty polymer industries seeking to develop novel materials with tailored properties.

Application

• Pharmaceutical Intermediates: Key precursor in the synthesis of active pharmaceutical ingredients (APIs) and complex drug molecules.
• High-Performance Polymers: Monomer for producing modified polyesters, polyamides, and liquid crystal polymers (LCPs) with improved thermal and mechanical properties.
• Agrochemical Synthesis: Building block for creating advanced herbicides, fungicides, and plant growth regulators.
• Metal-Organic Frameworks (MOFs): Organic linker for constructing porous coordination polymers used in gas storage and catalysis.
• Dyes and Pigments: Intermediate in the manufacture of specialized colorants and optical brighteners.
• Epoxy Resin Modifiers: Used to introduce rigidity and improve the heat resistance of epoxy curing agents and resin systems.
• Corrosion Inhibitors: Component in formulations for protecting metal surfaces in industrial applications.
• Research & Development: Versatile reagent for academic and industrial research in organic and materials chemistry.

Basic Information

Product Name	5-Methylisophthalic Acid
CAS No.	499-49-0
Molecular Formula	C9H8O4
Molecular Weight	180.16 g/mol
Synonyms	5-Methylbenzene-1,3-dicarboxylic acid; 3-Methylisophthalic acid; Isophthalic acid, 5-methyl-; 1,3-Benzenedicarboxylic acid, 5-methyl-; 5-Methyl-m-phthalic acid; 5-Methyl-1,3-benzenedicarboxylic acid
EINECS	207-884-6

Quality Control

Our 5-Methylisophthalic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via FT-IR and NMR, to ensure it meets stringent specifications for high-value synthesis. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance with your quality protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong bases and oxidizing agents.

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%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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