Description

5-Methoxy-3-Methylphthalic Acid is a high-purity, functionalized phthalic acid derivative serving as a critical building block in advanced organic synthesis. Its unique substitution pattern makes it a valuable intermediate for creating complex molecules with tailored properties. This compound is primarily utilized by research institutions and industrial manufacturers in the pharmaceutical, agrochemical, and specialty polymer sectors.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a substituted phthalic acid core.
• Agrochemical Synthesis: Used in the development of novel herbicides, fungicides, and plant growth regulators.
• Polymer & Material Science: Serves as a monomer or modifier in the production of specialty polyimides, polyesters, and epoxy resins, influencing thermal and mechanical properties.
• Organic Light-Emitting Diodes (OLEDs): Potential intermediate in the synthesis of electron-transport or host materials for optoelectronic applications.
• Dye & Pigment Manufacturing: Acts as a starting material for creating complex colorants and fluorescent markers.
• Chemical Research & Development: A versatile scaffold for medicinal chemistry and novel compound library generation in contract research organizations (CROs).

Basic Information

Product Name	5-Methoxy-3-Methylphthalic Acid
CAS No.	103203-38-9
Molecular Formula	C10H10O5
Molecular Weight	210.18 g/mol
Synonyms	3-Methyl-5-methoxyphthalic acid; 5-Methoxy-3-methylbenzene-1,2-dicarboxylic acid; 1,2-Benzenedicarboxylic acid, 5-methoxy-3-methyl-; 103203-38-9; 5-Methoxy-3-methylphthalic acid; 3-Methyl-5-methoxy-1,2-benzenedicarboxylic acid
EINECS	Contact for details

Quality Control

Every batch of 5-Methoxy-3-Methylphthalic Acid is manufactured and tested under a strict quality management system. We provide comprehensive analytical data to ensure the material meets your specific research or production requirements. A detailed Certificate of Analysis (COA) including purity, identity confirmation, and impurity profile is supplied with each shipment.

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 minimize exposure to atmospheric moisture. 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 structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
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.