Description

Methyl 5-Methoxy-Isophthalate is a high-purity diester derivative of isophthalic acid, serving as a critical building block in advanced organic synthesis. Its value lies in its dual functional ester groups and methoxy substituent, which provide precise reactivity for constructing complex molecular architectures. This compound is essential for research and development chemists and process engineers in the pharmaceutical, agrochemical, and specialty polymer industries who require reliable, high-quality intermediates for scale-up and production.

Application

• Pharmaceutical Intermediate: A key synthon in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a substituted aromatic core.
• Agrochemical Synthesis: Used in the development of herbicides, fungicides, and plant growth regulators where the methoxy-isophthalate structure imparts specific biological activity.
• Liquid Crystal & OLED Materials: Acts as a precursor for mesogenic compounds and electron-transport materials in display and lighting technologies.
• Polymer Modifier: Incorporated as a monomer or cross-linking agent to modify the thermal and mechanical properties of engineering plastics and specialty polyesters.
• Organic Synthesis Building Block: Utilized in academic and industrial R&D for Suzuki couplings, esterifications, and other catalytic transformations to create novel chemical entities.
• Dye & Pigment Intermediate: Serves in the synthesis of complex organic colorants and photoactive materials.

Basic Information

Product Name	Methyl 5-Methoxy-Isophthalate
CAS No.	71590-08-4
Molecular Formula	C11H12O5
Molecular Weight	224.21 g/mol
Synonyms	Dimethyl 5-Methoxyisophthalate; 5-Methoxyisophthalic Acid Dimethyl Ester; 1,3-Benzenedicarboxylic acid, 5-methoxy-, dimethyl ester; Isophthalic acid, 5-methoxy-, dimethyl ester; Methyl 5-methoxybenzene-1,3-dicarboxylate
EINECS	Contact for details

Quality Control

Our Methyl 5-Methoxy-Isophthalate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC, GC, and NMR, to ensure high chemical purity and lot-to-lot consistency. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming compliance with agreed specifications. We support cGMP standards for pharmaceutical applications and can tailor purity grades to meet specific project requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong oxidizing agents and bases. The product is moisture-sensitive; ensure containers are sealed after use to prevent degradation.

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	< 10 ppm

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