18643-08-8

Basic information

• Product Name: CHLORODIMETHYLOCTADECYLSILANE
• Synonyms: DIMETHYL-N-OCTADECYLCHLOROSILANE;DIMETHYL-N-OCTADECYLSILYL CHLORIDE;DIMETHYLOCTADECYLCHLOROSILANE;DIMETHYLOCTADECYLSILYLCHLORIDE;CHLORODIMETHYLOCTADECYLSILANE;CHLORODIMETHYL-N-OCTADECYLSILANE;STEARYLDIMETHYLCHLOROSILANE;SILANE ODM2
• CAS NO: 18643-08-8
• Molecular Formula: C₂₀H₄₃ClSi
• Molecular Weight: 347.09
• EINECS: 242-472-2
• Product Categories: Monochlorosilanes;Si (Classes of Silicon Compounds);Si-Cl Compounds
• Mol File: 18643-08-8.mol
• Article Data: 8

Chemical Properties

• Melting Point: 28-31 °C
• Boiling Point: 145-155 °C0.005 mm Hg(lit.)
• Flash Point: >230 °F
• Appearance: White/Solid
• Density: 0.86 g/mL at 20 °C(lit.)
• Vapor Pressure: 4.1E-06mmHg at 25°C
• Refractive Index: 1.4530
• Water Solubility: Reacts with water.
• Sensitive: Moisture Sensitive
• BRN: 2246012
• CAS DataBase Reference: CHLORODIMETHYLOCTADECYLSILANE(CAS DataBase Reference)
• NIST Chemistry Reference: CHLORODIMETHYLOCTADECYLSILANE(18643-08-8)
• EPA Substance Registry System: CHLORODIMETHYLOCTADECYLSILANE(18643-08-8)

Safety Data

• Hazard Codes: C,F
• Statements: 34-67-65-63-48/20-11-10
• Safety Statements: 26-36/37/39-45-62
• RIDADR: UN 2987 8/PG 2
• WGK Germany: 2
• F: 10-21
• TSCA: Yes
• HazardClass: 8
• PackingGroup: III
• Hazardous Substances Data: 18643-08-8(Hazardous Substances Data)

Usage

Description

Chlorodimethyl-n-octadecylsilane, also known as Chlorodimethyloctadecylsilane, is an organosilicon compound with the chemical formula (CH3)2Si(C18H37)Cl. It is a white to off-white crystalline powder that is soluble in organic solvents and has a molecular weight of approximately 363.09 g/mol. CHLORODIMETHYLOCTADECYLSILANE is known for its reactivity and is commonly used as a silylating reagent in various applications.

Uses

Used in Surface Modification Industry:
Chlorodimethyl-n-octadecylsilane is used as a silylating reagent for the preparation of hydrophobic surfaces. It is applied to create a hydrophobic coating on various substrates, such as glass, metal, and plastic, to prevent water and other polar molecules from adhering to the surface. This property is useful in applications where water resistance and easy cleaning are required, such as in laboratory glassware, medical devices, and industrial equipment.
Used in Chemical Synthesis:
Chlorodimethyl-n-octadecylsilane is used as a silylating reagent in chemical synthesis, particularly in the preparation of organosilicon compounds. It can be used to modify the properties of other molecules by attaching a silyl group, which can improve their stability, reactivity, or solubility. This application is valuable in the development of new materials and pharmaceuticals.
Used in Semiconductor Industry:
Chlorodimethyl-n-octadecylsilane is used as a chain terminator in the synthesis of silane-based polymers, which are used in the semiconductor industry. By controlling the length of the polymer chains, it is possible to create materials with specific properties, such as improved electrical conductivity or mechanical strength. This is crucial for the development of advanced electronic devices and components.

Flammability and Explosibility

Notclassified

InChI:InChI=1/C20H43ClSi/c1-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-22(2,3)21/h4-20H2,1-3H3

Upstream product

• 112-04-9 octadecyltrichlorosilane 
• 1184-58-3 dimethylaluminum chloride 
• 5157-75-5 n-octadecylmethyldichlorosilane 
• 75-44-5 phosgene 
• 75-77-4 chloro-trimethyl-silane 
• 58626-12-3 Hydroxydimethyloctadecylsilan 
• 107-06-2 1,2-dichloro-ethane 
• 75-78-5 dimethylsilicon dichloride 
• 112-89-0 1-Bromooctadecane 
• 1066-35-9 dimethylmonochlorosilane 
• 112-88-9 octadec-1-ene 

Downstream Products

• 1026266-64-7 DMODS-melphalan 
• 1429630-75-0 2-dimethyl-n-octylsilyl-5-dimethyl-n-octadecylsilyl-p-bis(bromomethyl)benzene 
• 850566-23-3 1-phenyl-2-(p-dimethyloctadecylsilyl)phenylacetylene 
• 76328-77-3 (dimethylamino)dimethyl(octadecyl)silane 

Relevant articles and documents

Effect of Bonded-Chain Rigidity on Selectivity in Reversed-Phase Liquid Chromatography

A model stationary phase has been synthesized and used to test the predictions of a lattice-model-based, unified molecular theory for selectivity in reversed-phase liquid chromatography recently proposed by Martire and Boehm.The results of the measurement of selectivity for flexible-chain, rigid-rod, and platelike solutes support the predictions of the model with selectivity following the order rods > plates > flexible chains.

Solvent-free hydrosilylation of alkenes and alkynes using recyclable platinum on carbon nanotubes

Platinum nanoparticles were stabilized at the surface of carbon nanotubes and the nanohybrid was valorized as a catalyst for the hydrosilylation of alkenes and alkynes. The heterogeneous catalyst operated under sustainable conditions (room temperature, no solvent, low catalyst loading, air atmosphere) and exhibited improved stabilty as recycling and reuse could be achieved for multiple consecutive reactions.

Waste-free and efficient hydrosilylation of olefins

High purity silicone precursors can now be synthesized by hydrosilylation of solvent-free olefins catalyzed by a highly stable and active glass hybrid catalyst consisting of mesoporous organosilica microspheres doped with Pt nanoparticles. These findings open the door to the sustainable manufacture of silicone and a way to further reduce the amount of platinum in silicones, which are ubiquitous advanced polymers with multiple uses and applications.

Method for producing chlorosilanes

A method for producing chlorosilanes, which are useful in a wide range of industrial field as an intermediate for organosilicon products such as silicone rubbers, silicone oils, silicone resins, etc. as well as a raw material for the production of organic chemicals such as medicines, agricultural chemicals, dyestuffs, etc., represented by the general formula, STR1 wherein R1 and R4, which may be the same or different, represent an alkyl group having from 1 to 5 carbon atoms, a chloromethyl group, an ethynyl group or a halogen atom; R2 and R3, which may be the same or different, represent an alkyl group having from 1 to 3 carbon atoms; R5 and R6, which may be the same or different, represent an alkyl group having from 1 to 2 carbon atoms; and R7 represents an alkyl group having from 1 to 18 carbon atoms, which comprises reacting a disiloxane represented by the general formula, STR2 wherein R1, R2, R3, R4, R5 and R6 are as defined above, or a silanol represented by the general formula, STR3 wherein R2, R3 and R7 are as defined above, with phosgene in the presence or absence of a tertiary amide.