Description

5-Methoxyisophthalic Acid is a high-purity aromatic dicarboxylic acid derivative, serving as a critical building block in advanced organic synthesis. Its unique methoxy-substituted isophthalate structure provides valuable chemical functionality for creating complex molecular architectures. This compound is essential for research and development chemists and process engineers in the pharmaceutical, agrochemical, and specialty polymer industries seeking to develop novel active ingredients and high-performance materials.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a rigid, functionalized aromatic core.
• Agrochemical Synthesis: Building block for developing novel herbicides, fungicides, and plant growth regulators with tailored properties.
• Polymer & Material Science: Monomer for the production of specialty polyesters, polyamides, and liquid crystal polymers (LCPs) to enhance thermal stability and mechanical performance.
• Metal-Organic Frameworks (MOFs): Organic linker used in constructing porous coordination polymers for gas storage, separation, and catalysis applications.
• Dye & Pigment Intermediate: Used in the synthesis of advanced colorants and optical brighteners.
• Crosslinking Agent: Functions as a crosslinker in epoxy resins and other thermosetting polymers to improve network density and chemical resistance.
• Academic & Industrial Research: Valuable reagent for methodological development and exploring new synthetic pathways in organic chemistry.

Basic Information

Product Name	5-Methoxyisophthalic Acid
CAS No.	46331-50-4
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
EINECS	Contact for details

Quality Control

Our 5-Methoxyisophthalic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for synthetic applications. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting key parameters such as assay, impurity profile, and physical characteristics.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	265 - 275 °C
Loss on Drying	≤ 1.0 %
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.