Description

1,3-Dichloro-1,3-Bis(1,1-Dimethylethyl)-1,3-Dimethylpropanedisiloxane is a specialized organosilicon compound, specifically a chlorinated disiloxane, valued for its role as a key synthetic intermediate and precursor in advanced silicone chemistry. Its molecular structure, featuring reactive silicon-chlorine bonds and bulky tert-butyl groups, makes it a critical building block for creating custom siloxane polymers and functional materials with tailored properties. This high-purity chemical is essential for R&D and production in sectors requiring precise molecular control, such as specialty polymers, advanced materials science, and performance additives.

Application

• Silicone Polymer Synthesis: Serves as a fundamental monomer or chain extender for synthesizing novel polysiloxanes with specific backbone architectures.
• Surface Modification Agent: Used to create hydrophobic or oleophobic coatings on glass, metals, and ceramics via silanization reactions.
• Crosslinking Agent: Functions as a reactive crosslinker in the formulation of heat-cured silicone elastomers and resins, enhancing mechanical strength.
• Pharmaceutical & Agro-Intermediate: Acts as a protected or functionalized intermediate in the multi-step synthesis of complex bioactive molecules.
• Adhesion Promoters: A key ingredient in primers and coupling agents designed to improve adhesion between organic polymers and inorganic substrates.
• Laboratory Reagent: Employed in academic and industrial research for studying organosilicon reaction mechanisms and developing new synthetic methodologies.

Basic Information

Product Name	1,3-Dichloro-1,3-Bis(1,1-Dimethylethyl)-1,3-Dimethylpropanedisiloxane
CAS No.	72259-76-8
Molecular Formula	C12H28Cl2O2Si2
Molecular Weight	331.43 g/mol
Synonyms	1,3-Dichloro-1,3-di-tert-butyl-1,3-dimethyldisiloxane; 1,3-Dichloro-1,3-di-tert-butyldimethyldisiloxane; Dichlorodi-tert-butyldimethyldisiloxane; 1,1'-Dichloro-3,3'-di-tert-butyl-1,1',3,3'-tetramethyldisiloxane; Di-tert-butyldichlorodimethyldisiloxane; (Chlorodi-tert-butylmethylsilyl)oxy(chlorodimethylsilyl)methane; Contact for additional synonyms.
EINECS	Contact for details

Quality Control

Our production of 1,3-Dichloro-1,3-Bis(1,1-Dimethylethyl)-1,3-Dimethylpropanedisiloxane adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analysis using advanced techniques such as GC, NMR, and titration to verify identity, assay, and impurity profiles. Certificates of Analysis (COA) detailing all critical specifications are provided and available upon request, supporting compliance with rigorous R&D and manufacturing standards.

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 and highly volatile nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent moisture absorption and decomposition. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Chlorine Content	20.5 - 21.5 %
Density (25°C)	0.98 - 1.02 g/mL

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