Description

4,4'-(1,2-Diphenylethene-1,2-Diyl)Dibenzoic Acid is a symmetrical, conjugated dicarboxylic acid featuring a central stilbene core flanked by two benzoic acid moieties — enabling strong π-electron delocalization and high thermal/chemical stability. This structure confers exceptional utility as a high-performance monomer for advanced functional polymers, particularly in optoelectronic and liquid crystalline materials where precise molecular geometry and acid functionality are critical. It is primarily sought by R&D chemists and process engineers in specialty polymer synthesis, OLED material development, and high-temperature resin formulation. The compound is identified by CAS NO 1609575-40-7.

Application

• Synthesis of conjugated polyesters and polyamides for flexible OLED substrates and transparent conductive films
• Monomer for liquid crystalline polymers (LCPs) requiring high thermal stability (>300 °C) and low dielectric loss
• Building block in metal–organic frameworks (MOFs) for gas separation membranes due to its rigid, planar geometry and dual carboxyl coordination sites
• Intermediate in the preparation of photoresponsive supramolecular gels and stimuli-responsive hydrogels
• Co-monomer in high-performance thermosetting resins for aerospace composites and microelectronics encapsulation
• Functional linker in surface-grafted self-assembled monolayers (SAMs) on ITO or gold electrodes for biosensor development

Basic Information

Product Name	4,4'-(1,2-Diphenylethene-1,2-Diyl)Dibenzoic Acid
CAS No.	1609575-40-7
Molecular Formula	C28H20O4
Molecular Weight	428.46 g/mol
Synonyms	4,4'-Stilbenedicarboxylic acid; trans-4,4'-Stilbenedicarboxylic acid; (E)-4,4'-(Ethene-1,2-diyl)dibenzoic acid; 4,4'-(1,2-Ethenediyl)bis(benzoic acid); Stilbene-4,4'-dicarboxylic acid; 4,4'-Dicarboxystilbene; trans-1,2-Bis(4-carboxyphenyl)ethylene; BCB-120 (research code)
EINECS	Not listed (not pre-registered under REACH as of 2024)

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request. All batches are verified for identity (FT-IR, 1H NMR), assay (HPLC with UV detection), residual solvents (GC), heavy metals (ICP-MS), and trace metal impurities per ICH Q3D guidelines. Manufacturing adheres to ISO 9001:2015 and cGMP principles for fine chemical intermediates.

Storage

Preserve in a tightly closed container, protected from light. Store at 15–25 °C in a dry, well-ventilated area. Avoid exposure to strong acid/organic solvent vapors and direct sunlight. Keep away from incompatible materials including strong oxidizers and strong alkalis.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identity (IR)	Conforms to reference standard
Assay (HPLC)	≥ 99.0%
Residue on Ignition	≤ 0.1%
Water (Karl Fischer)	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Melting Point	325–330 °C (decomposes)
Solubility	Soluble in DMF, DMSO, hot NMP; sparingly soluble in THF, chloroform; insoluble in water

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