Description

4-(4-Hydroxyphenoxy)Benzoic Acid is a high-purity organic compound with the CAS registry number 500-76-5. This versatile aromatic acid derivative serves as a critical building block and intermediate in advanced chemical synthesis. It is essential for manufacturers and R&D laboratories in the pharmaceutical, agrochemical, and specialty polymer industries seeking reliable, high-quality raw materials for their processes.

Application

This compound is a valuable intermediate with applications across several high-tech industries. Its bifunctional structure makes it suitable for creating complex molecules.

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a diphenyl ether linkage.
• Agrochemical Synthesis: Serves as a key precursor in the development of modern herbicides and plant growth regulators.
• Liquid Crystal Materials: Acts as a core component in the production of monomers for high-performance liquid crystal polymers (LCPs).
• Polymer Modification: Employed to introduce phenolic and carboxylic acid functionalities into polymer chains, enhancing properties like thermal stability and adhesion.
• Organic Synthesis & Research: A valuable reagent in academic and industrial R&D for constructing complex aromatic ethers and esters.
• Dye & Pigment Intermediate: Used in the synthesis of specialized dyes and organic pigments.

Basic Information

Product Name	4-(4-Hydroxyphenoxy)Benzoic Acid
CAS No.	500-76-5
Molecular Formula	C13H10O4
Molecular Weight	230.22 g/mol
Synonyms	4-Carboxy-4'-hydroxydiphenyl Ether; Benzoic acid, 4-(4-hydroxyphenoxy)-; 4-(4-Hydroxyphenoxy)benzoic acid; p-(p-Hydroxyphenoxy)benzoic Acid; 4-Hydroxyphenoxybenzoic Acid; 4,4'-Oxybis(phenol)-4-carboxylic acid (obsolete); [1,1'-Biphenyl]-4-carboxylic acid, 4'-hydroxy-4-oxy-
EINECS	207-916-5

Quality Control

Our 4-(4-Hydroxyphenoxy)Benzoic Acid is produced under strict quality management systems. Every batch undergoes comprehensive analytical testing to ensure it meets the high-purity standards required for sensitive synthetic applications. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee traceability and batch-to-batch consistency.

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). This product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	245 - 250 °C
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.