Description

3,3'-Thiobisphenol CAS NO 63572-32-7 is a high-purity organic sulfur compound featuring two phenolic groups linked by a thioether bridge. This unique structure makes it a valuable intermediate and additive, particularly in the synthesis of advanced polymers and as an antioxidant or stabilizer. It is essential for manufacturers in the polymer, specialty chemical, and material science industries seeking to enhance product performance and durability.

Application

• Polymer Synthesis: A key monomer and chain extender in the production of high-performance polyesters, polycarbonates, and epoxy resins, imparting improved thermal and chemical resistance.
• Antioxidant & Stabilizer: Functions as an effective antioxidant in plastics, rubber, and lubricants to prevent thermal degradation and extend material lifespan.
• Pharmaceutical Intermediates: Serves as a crucial building block in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Liquid Crystal Polymers (LCPs): Used as a comonomer to modify the properties of LCPs for electronics and high-temperature applications.
• Adhesives & Coatings: Enhances the adhesive strength and environmental stability of advanced adhesive formulations and protective coatings.
• Flame Retardant Synergist: Acts in combination with other compounds to improve the flame-retardant efficiency of polymeric materials.

Basic Information

Product Name	3,3'-Thiobisphenol
CAS No.	63572-32-7
Molecular Formula	C₁₂H₁₀O₂S
Molecular Weight	218.27 g/mol
Synonyms	3,3'-Thiodiphenol; Bis(3-hydroxyphenyl) Sulfide; 3-Hydroxyphenyl Sulfide; Thiobis(3-phenol); 1,1'-Sulfonylbis[3-benzene]; (3-Hydroxyphenyl) Sulfide; 3,3'-Dihydroxydiphenyl Sulfide
EINECS	Contact for details

Quality Control

Our 3,3'-Thiobisphenol 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. A Certificate of Analysis (COA) detailing all relevant parameters is provided with each shipment to guarantee traceability and compliance with your requirements.

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.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	115 - 120 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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