Description

2,4-Bis(1,1-Dimethylethyl)-2β,4α-Bis(2,4,6-Trimethylphenyl)Cyclobutanedisiloxane is a high-purity, sterically hindered organosilicon compound, valued for its role as a key intermediate and building block in advanced material synthesis. Its unique cyclobutane-disiloxane core structure provides exceptional thermal and chemical stability, making it a critical component for demanding applications. This product is essential for R&D and production in the pharmaceutical, specialty polymer, and advanced electronics industries where precise molecular architecture is required.

Application

• Pharmaceutical Intermediate: Used in the synthesis of novel active pharmaceutical ingredients (APIs) and as a precursor for silicon-containing drug candidates.
• Advanced Polymer Synthesis: Serves as a monomer or cross-linking agent for high-performance silicones, polyimides, and other specialty polymers requiring enhanced thermal stability.
• Material Science Research: A key building block for developing new organosilicon frameworks, metal-organic frameworks (MOFs), and hybrid materials.
• Electronics & Semiconductor Industry: Potential use in low-k dielectric materials, photoresists, and as a precursor for chemical vapor deposition (CVD) processes.
• Catalyst Ligand Synthesis: The bulky substituents make it a candidate for constructing sophisticated ligands in homogeneous catalysis.
• Specialty Additives: Can be utilized in the formulation of high-temperature lubricants, release agents, and surface modifiers.

Basic Information

Product Name	2,4-Bis(1,1-Dimethylethyl)-2β,4α-Bis(2,4,6-Trimethylphenyl)Cyclobutanedisiloxane
CAS No.	95206-56-7
Molecular Formula	C30H46O2Si2
Molecular Weight	494.86 g/mol
Synonyms	2,4-Di-tert-butyl-2,4-bis(2,4,6-trimethylphenyl)cyclobutane-1,3-disiloxane; 1,3-Disilacyclobutane-2,4-dione, 2,4-di-tert-butyl-2,4-bis(2,4,6-trimethylphenyl)-; Cyclobutane-1,3-disiloxane, 2,4-di-tert-butyl-2,4-bis(2,4,6-trimethylphenyl)-; 2,4-Di-tert-butyl-2,4-bis(mesityl)cyclobutane-1,3-disiloxane; 2,4-Bis(tert-butyl)-2,4-bis(2,4,6-trimethylphenyl)-1,3-disilacyclobutane-1,3-diol; Sterically hindered cyclobutadisiloxane; Tetramesityldi-tert-butylcyclobutadisiloxane
EINECS	Contact for details

Quality Control

Our 2,4-Bis(1,1-Dimethylethyl)-2β,4α-Bis(2,4,6-Trimethylphenyl)Cyclobutanedisiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, GC, NMR, and FT-IR, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are provided with every shipment. We support compliance with REACH and other relevant global regulatory frameworks.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (NMR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
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.