Description

Sulphonylbisphenol CAS NO 25641-61-6 is a specialized bisphenol derivative featuring a sulfonyl bridging group, offering enhanced thermal stability and chemical resistance compared to standard bisphenol compounds. This high-purity intermediate is critical for synthesizing advanced polymers and specialty chemicals where performance under demanding conditions is required. It is primarily sought by manufacturers in the polymer, epoxy resin, and high-performance material sectors.

Application

• Polymer Intermediate: A key monomer for the synthesis of polysulfones, polyethersulfones, and other high-temperature engineering plastics.
• Epoxy Resin Modifier: Used to incorporate sulfone groups into epoxy resin systems, improving their thermal stability, toughness, and chemical resistance.
• Flame Retardant Synergist: Acts as a co-monomer or additive in flame-retardant polymer formulations.
• Specialty Chemical Synthesis: Serves as a versatile building block for pharmaceuticals, agrochemicals, and advanced organic materials.
• Adhesive & Coating Formulations: Enhances the durability and performance of high-end industrial adhesives and protective coatings.
• Composite Materials: Used in the production of fiber-reinforced composites for aerospace and automotive applications.

Basic Information

Product Name	Sulphonylbisphenol
CAS No.	25641-61-6
Molecular Formula	C13H12O4S
Molecular Weight	264.30 g/mol
Synonyms	4,4'-Sulfonyldiphenol; Bisphenol S; 4,4'-Dihydroxydiphenyl sulfone; Bis(4-hydroxyphenyl) sulfone; DHDPS; BPS; 4-Hydroxyphenyl sulfone; Phenol, 4,4'-sulfonylbis-
EINECS	247-153-6

Quality Control

Our Sulphonylbisphenol is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for high-performance applications. Certificates of Analysis (COA) documenting purity, moisture content, and related substance levels are provided and available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

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%
Related Substances (HPLC)	Total impurities ≤ 1.0%

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