Description

4,4'-Dihydroxy-2,2',5,5'-Tetramethyl[Sulfonylbisbenzene] is a high-purity, diaryl sulfone derivative characterized by its symmetrical tetramethyl-substituted phenolic structure. This compound is valued as a versatile chemical intermediate and monomer for advanced material synthesis, offering excellent thermal stability and structural rigidity. It is primarily sought by manufacturers in the polymer, specialty chemical, and pharmaceutical industries for developing high-performance resins, engineering plastics, and functional additives.

Application

• Polymer Synthesis: Key monomer for producing high-temperature resistant polyethersulfones (PES), polysulfones (PSU), and other specialty engineering plastics.
• Advanced Material Production: Intermediate in the manufacture of liquid crystal polymers (LCPs), epoxy resin hardeners, and other high-performance thermosetting resins.
• Pharmaceutical Intermediates: Used in the synthesis of complex drug molecules and active pharmaceutical ingredients (APIs) requiring a rigid, stable biphenyl core.
• Agrochemicals: Building block for developing novel herbicides, fungicides, and plant growth regulators.
• Dye and Pigment Industry: Serves as a precursor for synthesizing high-stability, color-fast dyes and organic pigments.
• Crosslinking Agent: Utilized in formulations for coatings, adhesives, and composites to enhance crosslink density and thermal properties.
• Research & Development: Valuable reagent in academic and industrial R&D for material science and organic chemistry studies.

Basic Information

Product Name	4,4'-Dihydroxy-2,2',5,5'-Tetramethyl[Sulfonylbisbenzene]
CAS No.	19855-67-5
Molecular Formula	C₁₆H₁₈O₄S
Molecular Weight	306.38 g/mol
Synonyms	4,4'-Dihydroxy-2,2',5,5'-tetramethyldiphenyl sulfone; 2,2',5,5'-Tetramethyl-4,4'-sulfonyldiphenol; Bis(4-hydroxy-2,5-dimethylphenyl) sulfone; 4,4'-Sulfonylbis(2,5-dimethylphenol); Dihydroxytetramethyldiphenyl sulfone; Tetramethyl BPS; TM-BPS; TM-DPS
EINECS	243-357-6

Quality Control

Our production of 4,4'-Dihydroxy-2,2',5,5'-Tetramethyl[Sulfonylbisbenzene] adheres to a stringent quality management system. Every batch undergoes comprehensive analytical testing, including HPLC, GC, and NMR, to ensure high purity and consistent composition. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications. We support custom synthesis and purity grades to meet specific application requirements from R&D to commercial scale.

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, strong acids, and strong bases. The product is light-sensitive and should be stored away from direct light exposure.

Specification

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