Description

5-Hydroxy-Isophthalic Acid Monomethyl Ester is a high-purity, functionalized aromatic ester derivative that serves as a critical building block in advanced organic synthesis. Its unique structure, featuring both a phenolic hydroxyl and a carboxylic ester group on the same benzene ring, makes it a versatile intermediate for creating complex molecules with tailored properties. This compound is essential for research and production in industries focused on high-performance materials and fine chemicals, where precise molecular architecture is paramount.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a rigid, functionalized aromatic core.
• Liquid Crystal & OLED Materials: Serves as a building block for mesogenic and electron-transporting molecules used in display technologies and organic light-emitting diodes.
• Polymer & Resin Modifier: Incorporated into polyester, epoxy, or polyimide resins to enhance thermal stability, adhesion, and chemical resistance.
• Coating & Adhesive Formulations: Used to develop specialty coatings with improved durability, weatherability, and cross-linking density.
• Dye & Pigment Synthesis: Intermediate for manufacturing advanced colorants, optical brighteners, and photostable dyes.
• Agrochemical Synthesis: Building block for developing novel herbicides, fungicides, and plant growth regulators with specific activity.
• Metal-Organic Framework (MOF) Precursor: Utilized in the construction of sophisticated porous materials for catalysis, gas storage, and separation.
• Academic & Industrial R&D: Valuable reagent for methodological development and exploring new chemical reactions in organic chemistry laboratories.

Basic Information

Product Name	5-Hydroxy-Isophthalic Acid Monomethyl Ester
CAS No.	167630-15-1
Molecular Formula	C9H8O5
Molecular Weight	196.16 g/mol
Synonyms	5-Hydroxyisophthalic Acid 1-Methyl Ester; Monomethyl 5-Hydroxyisophthalate; 1-Methoxycarbonyl-3-hydroxy-5-benzoic Acid; 5-Hydroxybenzene-1,3-dicarboxylic Acid Monomethyl Ester; 3-Hydroxy-5-(methoxycarbonyl)benzoic Acid; 5-Carboxy-3-hydroxybenzoic Acid Methyl Ester; Isophthalic Acid, 5-hydroxy-, Monomethyl Ester
EINECS	Contact for details

Quality Control

Our production of 5-Hydroxy-Isophthalic Acid Monomethyl Ester adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The material is characterized and released against comprehensive specifications, including identity confirmation, assay, and impurity profiling. Certificates of Analysis (COA) detailing all test results are provided with each shipment and are available upon request to support your quality assurance and regulatory needs.

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 bases and incompatible materials such as strong oxidizing agents. The container should be kept tightly sealed when not in use to minimize exposure to atmospheric moisture.

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%
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.