Description

5-tert-Butyl-Isophthalic Acid Monomethyl Ester is a high-purity, specialized organic intermediate of significant importance in advanced chemical synthesis. This compound matters for its role as a key building block in the production of high-performance polymers, liquid crystals, and pharmaceutical active ingredients. It is primarily needed by R&D chemists and process engineers in the fine chemical, advanced material, and pharmaceutical industries seeking to introduce sterically hindered, functionalized aromatic units into complex molecular architectures.

Application

• Polymer Chemistry: As a monomer or co-monomer for synthesizing high-performance polyesters, polyamides, and polyimides with enhanced thermal stability and mechanical properties.
• Liquid Crystal Displays (LCDs): Serves as a crucial intermediate in the synthesis of liquid crystal molecules for electronic displays, leveraging the tert-butyl group to modify mesogenic properties.
• Pharmaceutical Intermediates: Used in the research and development of active pharmaceutical ingredients (APIs), where the isophthalate ester moiety is a versatile synthetic handle.
• Organic Synthesis & Catalysis: Acts as a ligand precursor or a structurally complex scaffold in organometallic chemistry and asymmetric catalysis.
• Advanced Material Research: Employed in the development of metal-organic frameworks (MOFs), covalent organic frameworks (COFs), and other porous materials.
• Coatings and Resins: A functional modifier in specialty coatings, adhesives, and epoxy resin systems to improve chemical resistance and durability.

Basic Information

Item	Details
Product Name	5-tert-Butyl-Isophthalic Acid Monomethyl Ester
CAS No.	377731-29-8
Molecular Formula	C14H18O4
Molecular Weight	250.29 g/mol
Synonyms	Monomethyl 5-tert-butylisophthalate; 5-(tert-Butyl)isophthalic Acid 1-Methyl Ester; 1-Methyl 5-tert-butylbenzene-1,3-dicarboxylate; 5-tert-Butyl-1,3-benzenedicarboxylic Acid Monomethyl Ester; 5-tert-Butylisophthalic Acid Methyl Ester; Methyl 5-tert-butylisophthalate; 5-tert-Butylisophthalic Acid 1-Mono Methyl Ester; 3-(Methoxycarbonyl)-5-tert-butylbenzoic Acid
EINECS	Contact for details

Quality Control

Our 5-tert-Butyl-Isophthalic Acid Monomethyl Ester is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure high chemical purity and consistency. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are available for every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, and open flame. Due to its light-sensitive nature, the container should be opaque or stored in dark conditions.

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%
Heavy Metals (as Pb)	≤ 10 ppm

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