Description

4,4'-Sulfonylbis(2,6-Dibromophenol) is a high-purity brominated phenolic compound primarily used as a reactive intermediate and flame retardant synergist. Its molecular structure makes it a valuable building block for synthesizing advanced polymers and as a key component in enhancing the fire resistance of various materials. This product is essential for manufacturers and R&D teams in the polymer, electronics, and specialty chemical industries seeking to improve material performance and meet stringent safety regulations.

Application

• Flame Retardant Synergist: Used in combination with other flame retardants, particularly in epoxy resins, polycarbonates, and other engineering plastics to enhance fire resistance and meet UL94 standards.
• Polymer Intermediate: Serves as a key monomer or cross-linking agent in the synthesis of high-performance polymers, such as polyethersulfones (PES) and polyarylates, imparting thermal stability and flame retardancy.
• Electronic Encapsulants: Incorporated into potting compounds and encapsulants for electronic components to provide critical flame retardant properties.
• Adhesive & Coating Formulations: Used in specialty adhesives and protective coatings where enhanced fire safety is required without compromising mechanical properties.
• Research & Development: Employed in laboratories for developing new brominated compounds and studying structure-property relationships in flame retardant chemistry.

Basic Information

Product Name	4,4'-Sulfonylbis(2,6-Dibromophenol)
CAS No.	39635-79-5
Molecular Formula	C12H6Br4O4S
Molecular Weight	615.86 g/mol
Synonyms	2,2'-Sulfonylbis(4,6-dibromophenol); Tetrabromobisphenol S (TBBPS); 4,4'-Sulfonyldi(2,6-dibromophenol); Phenol, 4,4'-sulfonylbis[2,6-dibromo-; Bis(2,6-dibromo-4-hydroxyphenyl) sulfone; TBBPA-S; Fire Guard TBBPS; Brominated bisphenol S
EINECS	Contact for details

Quality Control

Our 4,4'-Sulfonylbis(2,6-Dibromophenol) is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided and available upon request to support your quality assurance and regulatory compliance needs.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture. Keep away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	220 - 225 °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.