Description

5-Methoxyisophthalic Acid is a high-purity aromatic dicarboxylic acid derivative, serving as a critical building block in advanced organic synthesis. Its value lies in its unique substitution pattern, which provides a versatile platform for creating complex molecular architectures with tailored properties. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries, where it is used to develop active ingredients, functional monomers, and high-performance materials.

Application

• Pharmaceutical Intermediates: A key synthon for the development of novel active pharmaceutical ingredients (APIs), particularly in kinase inhibitors and other small-molecule therapeutics.
• Liquid Crystal & OLED Materials: Serves as a core component in the synthesis of advanced organic electronic materials, including liquid crystal displays (LCDs) and organic light-emitting diodes (OLEDs).
• High-Performance Polymers: Used as a monomer for producing specialty polyamides, polyesters, and polyimides with enhanced thermal stability and mechanical properties.
• Agrochemical Synthesis: Employed in the research and production of advanced herbicides, fungicides, and plant growth regulators.
• Metal-Organic Frameworks (MOFs): Acts as a functional organic linker in the construction of porous MOF materials for gas storage, separation, and catalysis.
• Dye & Pigment Chemistry: A precursor for synthesizing complex dyes and pigments with specific colorfastness and stability characteristics.
• Cross-Coupling Reactions: A valuable substrate in palladium-catalyzed cross-coupling reactions (e.g., Suzuki, Heck) for constructing biaryl systems.
• Academic & Contract Research: A versatile reagent for chemical research in academic institutions and contract research organizations (CROs).

Basic Information

Item	Detail
Product Name	5-Methoxyisophthalic Acid
CAS No.	90560-22-8
Molecular Formula	C9H8O5
Molecular Weight	196.16 g/mol
Synonyms	5-Methoxybenzene-1,3-dicarboxylic Acid; Isophthalic Acid, 5-Methoxy-; 1,3-Benzenedicarboxylic acid, 5-methoxy-; 5-Methoxy-m-phthalic Acid; 5-Methoxyisophthalate; 5-Methoxy-1,3-benzenedicarboxylic Acid
EINECS	Contact for details

Quality Control

Our 5-Methoxyisophthalic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and FTIR, to ensure identity, purity, and consistency meet the highest standards. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment. We support cGMP compliance for pharmaceutical applications and can tailor specifications to meet specific project requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong oxidizing agents, strong bases, and sources of ignition. For long-term storage, consider storing under an inert atmosphere to maintain optimal purity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	265 - 270 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.5%

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