Description

4,4’-Butanediyldioxydibenzoic Acid is a high-purity aromatic dicarboxylic acid derivative, serving as a critical building block in advanced polymer synthesis. This compound is valued for its ability to introduce specific chain length and ether linkages into polymer backbones, directly influencing material properties like flexibility, thermal stability, and solubility. It is primarily sought by R&D chemists and production engineers in the specialty polymers, liquid crystal materials, and pharmaceutical intermediates sectors.

Application

• Monomer for High-Performance Polymers: A key monomer in the synthesis of polyesters, polyamides, and polyarylates, contributing to enhanced thermal and mechanical properties.
• Liquid Crystal Polymers (LCPs): Used as a rigid-rod comonomer to create thermotropic LCPs for electronics, aerospace, and high-barrier packaging.
• Pharmaceutical Intermediate: Acts as a versatile synthon for constructing complex drug molecules, particularly those requiring specific aromatic spacing and functional groups.
• Crosslinking Agent: Employed in epoxy and other thermoset resin systems to improve crosslink density and thermal resistance.
• Specialty Additive Synthesis: Serves as a precursor for UV stabilizers, antioxidants, and other polymer additives.
• Academic & Industrial Research: A valuable compound for material science research focused on new polymeric architectures and supramolecular chemistry.

Basic Information

Product Name	4,4’-Butanediyldioxydibenzoic Acid
CAS No.	3749-77-7
Molecular Formula	C18H18O6
Molecular Weight	330.33 g/mol
Synonyms	4,4'-(Butane-1,4-diylbis(oxy))dibenzoic Acid; 4,4'-(1,4-Butanediylbis(oxy))bis[benzoic acid]; 4,4'-Oxybis(butane-4,1-diyl) dibenzoate (acid form); Bis(4-carboxyphenoxy)butane; BCPB; 1,4-Bis(4-carboxyphenoxy)butane; p,p'-Oxybis(butane-4,1-diyl) dibenzoic acid
EINECS	223-140-2

Quality Control

Every batch of 4,4’-Butanediyldioxydibenzoic Acid is manufactured under a strict quality management system. We provide comprehensive analytical data to ensure the product meets the precise requirements for polymer-grade and research applications. A detailed Certificate of Analysis (COA) is supplied with each shipment, documenting purity, identity, and key impurity profiles.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after initial use to minimize moisture absorption, which can affect purity and handling properties.

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	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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