Description

4,4'-Sulfonylbis-Benzoic Acid is a high-purity aromatic dicarboxylic acid derivative featuring a central sulfone linkage. This compound matters as a versatile and critical building block for synthesizing advanced polymers and specialty chemicals, offering excellent thermal stability and mechanical properties. It is primarily needed by manufacturers in the pharmaceutical, agrochemical, and high-performance polymer industries for creating polyamides, polyesters, and active pharmaceutical ingredients (APIs).

Application

• Polymer Synthesis: A key monomer for producing high-temperature resistant polyamides (aramids), polyesters, and polyether sulfones (PES).
• Pharmaceutical Intermediates: Serves as a crucial building block in the synthesis of various active pharmaceutical ingredients (APIs) and drug candidates.
• Agrochemicals: Used in the manufacture of advanced herbicides, fungicides, and plant growth regulators.
• Liquid Crystal Polymers (LCPs): An important precursor for creating monomers used in LCP production for electronics and displays.
• Cross-linking Agent: Functions as a cross-linker in epoxy resins and other thermosetting polymers to enhance performance.
• Organic Synthesis: A versatile intermediate for constructing complex organic molecules in research and fine chemical production.
• Metal-Organic Frameworks (MOFs): Potential ligand for constructing porous coordination polymers with specific adsorption properties.

Basic Information

Product Name	4,4'-Sulfonylbis-Benzoic Acid
CAS No.	2449-35-6
Molecular Formula	C14H10O6S
Molecular Weight	306.29 g/mol
Synonyms	4,4'-Sulfonyldibenzoic Acid; Bis(4-carboxyphenyl) Sulfone; 4-Carboxyphenyl Sulfone; p-Carboxyphenyl Sulfone; 4,4'-Dicarboxydiphenyl Sulfone; DCDPS; Sulfonylbis(4-benzoic acid); 4,4'-(Sulfonylbis(4,1-phenylene))dibenzoic acid
EINECS	219-498-8

Quality Control

Our 4,4'-Sulfonylbis-Benzoic Acid is produced under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC, IR, and titration methods, to ensure it meets precise purity and specification requirements. A comprehensive Certificate of Analysis (COA) is provided with each shipment, detailing all critical quality parameters for your compliance and traceability needs.

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 opening to prevent moisture absorption, which can affect product quality and performance.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	300 - 305 °C
Loss on Drying	≤ 1.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1 %
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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