18642-94-9

Basic information

• Product Name: 1,3-DI-N-OCTYLTETRAMETHYLDISILOXANE
• Synonyms: 1,3-DI-N-OCTYLTETRAMETHYLDISILOXANE;1,3-DIOCTYLTETRAMETHYLDISILOXANE;1,1,3,3-Tetramethyl-1,3-dioctyldisiloxane;1,3-Di-n-octyl-1,1,3,3-Tetramethyl Disiloxane
• CAS NO: 18642-94-9
• Molecular Formula: C₂₀H₄₆OSi₂
• Molecular Weight: 358.75
• Mol File: 18642-94-9.mol
• Article Data: 4

Chemical Properties

• Melting Point: -36°C
• Boiling Point: 122 °C
• Flash Point: >110°C
• Appearance: /
• Density: 0.891
• Vapor Pressure: 0.00012mmHg at 25°C
• Refractive Index: 1.4740
• CAS DataBase Reference: 1,3-DI-N-OCTYLTETRAMETHYLDISILOXANE(CAS DataBase Reference)
• NIST Chemistry Reference: 1,3-DI-N-OCTYLTETRAMETHYLDISILOXANE(18642-94-9)
• EPA Substance Registry System: 1,3-DI-N-OCTYLTETRAMETHYLDISILOXANE(18642-94-9)

Safety Data

• Statements: 36/37/38
• Safety Statements: 26-36/37/39
• TSCA: No
• Hazardous Substances Data: 18642-94-9(Hazardous Substances Data)

Usage

General Description

1,3-Di-n-octyltetramethyldisiloxane is a type of organosilicon compound that consists of a silicon atom bonded to two methyl groups and two octyl groups. It is commonly used as a surfactant, lubricant, and as a component in silicone-based polymers. This chemical is known for its high thermal stability, low surface tension, and water-repelling properties, making it useful in industrial applications such as waterproofing agents, mold release agents, and as a coating for various surfaces. Additionally, it is also used in the production of personal care products, adhesives, and in the pharmaceutical industry as a component in drug delivery systems. While it is generally considered to have low toxicity, prolonged exposure to high concentrations of 1,3-Di-n-octyltetramethyldisiloxane can cause respiratory irritation and skin sensitization.

InChI:InChI=1/C20H46OSi2/c1-7-9-11-13-15-17-19-22(3,4)21-23(5,6)20-18-16-14-12-10-8-2/h7-20H2,1-6H3

Upstream product

• 3277-26-7 1,1,3,3-Tetramethyldisiloxane 
• 111-66-0 oct-1-ene 
• 17049-49-9 octylmagnesium bromide 
• 18162-84-0 dimethyl-n-octylchlorosilane 

Downstream Products

• 107-50-6 tetradecamethylcycloheptasiloxane 
• 541-05-9 Hexamethylcyclotrisiloxane 
• 556-67-2 octamethylcyclotetrasiloxane 
• 541-02-6 decamethylcyclopentasiloxane 
• 540-97-6 dodecamethyl-cyclohexasiloxane 

Relevant articles and documents

An efficient method for synthesizing monofunctionalized derivatives of 1,1,3,3-tetramethyldisiloxane in ionic liquids as recoverable solvents for rhodium catalyst

Functionalized siloxanes, as one of the most important classes of organosilicon compounds, are widely applied in industry. In our studies, we have investigated, the reaction between 1,1,3,3-tetramethyldisiloxane (TMDSO) and 1-octene, using the rhodium cat

Hydrosilylation of alkenes catalyzed by rhodium with polyethylene glycol-based ionic liquids as ligands

A series of polyethylene glycol-functionalized imidazolium ionic liquids has been prepared and characterized. These ionic liquids have been successfully applied in the hydrosilylation of alkenes catalyzed by rhodium complexes. The effects of the length of the polyether chain, the amount of ionic liquid, and the reaction temperature on the catalytic performance of hydrosilylation have been investigated. Furthermore, the catalytic system has been tested for the hydrosilylation of different alkenes with triethoxysilane. The new catalytic system exhibits both excellent catalytic activity and selectivity under low-temperature conditions. The catalyst system could be recycled five times with slightly deactivation.