Description

4-Hydroxy-5-Methyl-Isophthalic Acid Dimethyl Ester is a high-purity, functionalized aromatic diester with a phenolic hydroxyl group. This compound serves as a versatile and critical advanced intermediate for synthesizing complex organic molecules, particularly in fine chemical and pharmaceutical development. It is essential for research and production chemists in industries requiring specialty monomers, polymer modifiers, and active pharmaceutical ingredient (API) precursors.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel drug candidates and active pharmaceutical ingredients (APIs).
• Polymer & Resin Chemistry: Used as a specialty monomer or cross-linking agent to introduce hydroxyl functionality into polyesters, epoxy resins, and other high-performance polymers.
• Liquid Crystal & OLED Materials: Serves as a precursor in the production of advanced organic electronic materials and liquid crystal display (LCD) components.
• Agrochemical Synthesis: Intermediate in the manufacture of advanced herbicides, fungicides, and plant growth regulators.
• Dye & Pigment Industry: Building block for creating complex chromophores and functional dyes with specific light-absorption properties.
• Organic Synthesis & Research: A valuable reagent in academic and industrial R&D for constructing complex aromatic systems and testing new synthetic methodologies.

Basic Information

Product Name	4-Hydroxy-5-Methyl-Isophthalic Acid Dimethyl Ester
CAS No.	36727-18-1
Molecular Formula	C11H12O5
Molecular Weight	224.21 g/mol
Synonyms	Dimethyl 4-Hydroxy-5-Methylisophthalate; 5-Methyl-4-hydroxyisophthalic Acid Dimethyl Ester; 1,3-Benzenedicarboxylic Acid, 4-Hydroxy-5-Methyl-, Dimethyl Ester; Isophthalic Acid, 4-Hydroxy-5-Methyl-, Dimethyl Ester; Methyl 4-Hydroxy-5-Methylisophthalate; 4-Hydroxy-5-Methylisophthalic Acid Methyl Ester
EINECS	Contact for details

Quality Control

Our 4-Hydroxy-5-Methyl-Isophthalic Acid Dimethyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure high purity and batch-to-batch consistency. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and bases.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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