Description

5-Phenoxyisophthalic Acid is a high-purity aromatic dicarboxylic acid derivative, serving as a critical building block in advanced polymer and pharmaceutical synthesis. Its value lies in its bifunctional structure, which enables precise molecular design for creating materials with tailored thermal and mechanical properties. This compound is essential for R&D chemists and production engineers in the polymer, specialty chemical, and pharmaceutical intermediate sectors.

Application

• Polymer Synthesis: A key monomer for producing high-performance polyesters, polyamides, and liquid crystal polymers (LCPs) requiring enhanced thermal stability and rigidity.
• Pharmaceutical Intermediates: Used in the synthesis of active pharmaceutical ingredients (APIs) and complex organic molecules due to its reactive carboxylic acid groups.
• Specialty Chemicals: Serves as a precursor for dyes, pigments, and photoinitiators where the phenoxy group imparts specific solubility and reactivity characteristics.
• Cross-linking Agent: Functions as a cross-linker in epoxy resins and coatings to improve hardness, chemical resistance, and durability.
• Material Science Research: Employed in academic and industrial R&D for developing novel organic frameworks, such as Metal-Organic Frameworks (MOFs) or covalent organic polymers.
• Adhesive Formulations: Incorporated to modify the properties of high-temperature adhesives and sealants.

Basic Information

Product Name	5-Phenoxyisophthalic Acid
CAS No.	28023-55-4
Molecular Formula	C14H10O5
Molecular Weight	258.23 g/mol
Synonyms	5-Phenoxybenzene-1,3-dicarboxylic Acid; Isophthalic Acid, 5-Phenoxy-; 3-Carboxy-5-phenoxybenzoic Acid; 1,3-Benzenedicarboxylic acid, 5-phenoxy-; Phenoxyisophthalic Acid
EINECS	Contact for details

Quality Control

Our 5-Phenoxyisophthalic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. Certificates of Analysis (COA) documenting purity, appearance, and other critical parameters are provided with every shipment to guarantee supply reliability and batch-to-batch consistency.

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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality.

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%
Heavy Metals	< 10 ppm

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