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

Chemical Properties

white to off-white crystalline powder or

Uses

Different sources of media describe the Uses of 18643-08-8 differently. You can refer to the following data:
1. Chlorodimethyl-n-octadecylsilane is used for preparation of hydrophobic surfaces and chain terminator.
2. Silylating reagent

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

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

Downstream Products

• 1429630-75-0 2-dimethyl-n-octylsilyl-5-dimethyl-n-octadecylsilyl-p-bis(bromomethyl)benzene 
• 1026266-64-7 DMODS-melphalan 
• 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.