Description

4,4'-Sulfonyldiphenol is a high-purity aromatic sulfone compound, also known as Bisphenol S. This versatile chemical intermediate is valued for its excellent thermal stability and resistance to hydrolysis, making it a superior alternative to other bisphenols in demanding applications. It is essential for manufacturers in the polymer, specialty chemical, and electronics industries seeking to enhance material performance and durability.

Application

• Polymer Synthesis: A key monomer for producing high-performance polysulfone (PSU) and polyethersulfone (PES) resins, which are used in medical devices, filtration membranes, and aerospace components.
• Epoxy Resin Modifier: Imparts improved heat resistance, chemical stability, and mechanical strength to epoxy resin systems for advanced composites, coatings, and adhesives.
• Polycarbonate Copolymer: Serves as a comonomer to manufacture specialty polycarbonates with enhanced flame retardancy and clarity for optical and electronic applications.
• Dye & Pigment Intermediate: Used in the synthesis of heat-resistant dyes, optical brighteners, and specialty pigments for textiles and plastics.
• Pharmaceutical Intermediate: Employed in the controlled synthesis of certain active pharmaceutical ingredients (APIs) and drug delivery polymers.
• Crosslinking Agent: Functions as a crosslinker in the production of high-temperature resistant elastomers and specialty coatings.

Basic Information

Product Name	4,4'-Sulfonyldiphenol
CAS No.	46765-03-1
Molecular Formula	C12H10O4S
Molecular Weight	250.27 g/mol
Synonyms	Bisphenol S; 4,4'-Dihydroxydiphenyl sulfone; Bis(4-hydroxyphenyl) sulfone; DHDPS; 4,4'-Sulfonylbisphenol; 4,4'-Sulfonyldiphenol; 4,4'-Sulfonylbis(phenol); Phenol, 4,4'-sulfonylbis-
EINECS	Contact for details

Quality Control

Our 4,4'-Sulfonyldiphenol is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting all critical parameters are provided with each shipment.

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). Keep away from strong oxidizing agents and strong bases.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.0%
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.