Description

1,3-Di-Isopropyl-1,1,3,3-Tetramethyl Disiloxane is a specialized organosilicon compound with the CAS number 36957-90-1. This chemical serves as a versatile intermediate and functional modifier, prized for its unique disiloxane backbone and isopropyl groups which impart valuable properties to final formulations. It is essential for manufacturers in the silicone polymer, advanced materials, and specialty chemical synthesis sectors seeking to enhance product performance and develop novel materials.

Application

• Silicone Polymer Modification: Acts as a chain extender, endblocker, or crosslinking agent to tailor the molecular weight, flexibility, and thermal stability of silicone oils, resins, and elastomers.
• Surface Treatment & Coupling Agent: Used to modify inorganic surfaces (e.g., silica, metals) to improve compatibility, dispersion, and adhesion in composite materials and coatings.
• Pharmaceutical & Agrochemical Intermediates: Serves as a key building block in the synthesis of more complex organosilicon molecules for active ingredient development.
• Lubricant & Grease Formulation: Incorporated as an additive to enhance the thermal-oxidative stability and lubricity of high-performance synthetic lubricants.
• Adhesive & Sealant Precursor: Utilized in the production of silane-modified polymers (SMPs) and moisture-curable systems for construction and automotive applications.
• Research & Development: A valuable reagent in organic and organometallic chemistry for introducing silyl protecting groups or constructing silicon-based molecular architectures.

Basic Information

Product Name	1,3-Di-Isopropyl-1,1,3,3-Tetramethyl Disiloxane
CAS No.	36957-90-1
Molecular Formula	C10H28O2Si2
Molecular Weight	248.50 g/mol
Synonyms	Bis(1-methylethyl)tetramethyldisiloxane; 1,3-Diisopropyltetramethyldisiloxane; Tetramethyl-diisopropyldisiloxane; Disiloxane, 1,3-bis(1-methylethyl)-1,1,3,3-tetramethyl-; Diisopropyltetramethyldisiloxane; 1,1,3,3-Tetramethyl-1,3-diisopropyldisiloxane
EINECS	Contact for details

Quality Control

Our 1,3-Di-Isopropyl-1,1,3,3-Tetramethyl Disiloxane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including GC and NMR analysis, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and key physical properties are provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.1%
Refractive Index (n20/D)	1.4050 - 1.4100
Density (20°C)	0.82 - 0.86 g/mL

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