4525-44-4

Basic information

• Product Name: ETHYLMETHYLDICHLOROSILANE
• Synonyms: ETHYLMETHYLDICHLOROSILANE;DICHLOROETHYLMETHYLSILANE;dichloroethylmethyl-silan;Ethyldichloromethylsilane~Ethylmethyldichlorosilane;ETHYLMETHYLDICHLOROSILANE 97% MIN;Silane, dichloroethylmethyl-;ethyldichloromethylsilane;Methylethyldichlorosilane
• CAS NO: 4525-44-4
• Molecular Formula: C₃H₈Cl₂Si
• Molecular Weight: 143.09
• EINECS: 224-860-3
• Mol File: 4525-44-4.mol
• Article Data: 10

Chemical Properties

• Melting Point: 8°C
• Boiling Point: 100 °C(lit.)
• Flash Point: 54 °F
• Appearance: /
• Density: 1.063 g/mL at 25 °C(lit.)
• Vapor Pressure: 36.2mmHg at 25°C
• Refractive Index: n20/D 1.419(lit.)
• Sensitive: Moisture Sensitive
• BRN: 1361374
• CAS DataBase Reference: ETHYLMETHYLDICHLOROSILANE(CAS DataBase Reference)
• NIST Chemistry Reference: ETHYLMETHYLDICHLOROSILANE(4525-44-4)
• EPA Substance Registry System: ETHYLMETHYLDICHLOROSILANE(4525-44-4)

Safety Data

• Hazard Codes: F,C
• Statements: 11-34
• Safety Statements: 16-26-28-36/37/39-45
• RIDADR: UN 2985 3/PG 2
• WGK Germany: 1
• F: 10-21
• TSCA: Yes
• HazardClass: 3
• PackingGroup: II
• Hazardous Substances Data: 4525-44-4(Hazardous Substances Data)

Usage

General Description

ETHYLMETHYLDICHLOROSILANE is a chemical compound with the molecular formula C4H11Cl2Si. It is a colorless, flammable liquid with a strong odor that is used as a reagent in the synthesis of various organosilicon compounds. It is a versatile building block in the production of silicone polymers and resins, as well as in the manufacturing of adhesives, sealants, and coatings. ETHYLMETHYLDICHLOROSILANE is also used as a crosslinking agent in the production of silicone rubber and as a precursor in the synthesis of pharmaceuticals and agrochemicals. It should be handled with caution due to its flammability and potential for respiratory and skin irritation.

InChI:InChI=1/C3H8Cl2Si/c1-3-6(2,4)5/h3H2,1-2H3

Upstream product

• 75-54-7 Dichloromethylsilane 
• 74-85-1 ethene 
• 124-70-9 Dichloromethylvinylsilane 
• 75-77-4 chloro-trimethyl-silane 
• 60-29-7 diethyl ether 
• 100-59-4 phenylmagnesium chloride 
• 75-00-3 chloroethane 
• 7440-21-3 silicon 
• 74-86-2 acetylene 
• 115-21-9 ethyltrichlorosilane 
• 149-74-6 dichloromethylphenylsilane 
• 1719-53-5 diethyldichlorosilane 
• 75-79-6 Methyltrichlorosilane 
• 2386-64-3 ethylmagnesium chloride 

Downstream Products

• 7787-84-0 dichloro-(1-chloro-ethyl)-methyl-silane 
• 7787-85-1 2-chloroethylmethyldichlorosilane 
• 13405-80-6 Ethyl-methyl-p-tolyl-fluorsilan 
• 74-84-0 ethane 
• 74-85-1 ethene 
• 15901-49-2 2,4,6-triethyl-2,4,6-trimethylcyclotrisiloxane 
• 7623-01-0 2,4,6,8-tetraethyl-2,4,6,8-tetramethylcyclotetrasiloxane 
• 17940-63-5 2,4,6,8,10-pentaethyl-2,4,6,8,10-pentamethyl-cyclopentasiloxane 
• 18550-04-4 2,4,6,8,10,12-hexaethyl-2,4,6,8,10,12-hexamethyl-cyclohexasiloxane 
• 51657-50-2 Benzyl-chlor-ethyl-methylsilan 
• 906813-24-9 bis(4-hydroxyphenyl)ethylmethylsilane 
• 1214753-77-1 bis(4-methylphenyl)ethylmethylsilane 
• 82364-02-1 Chlorethylmethyl(2-phenylethyl)silan 

Relevant articles and documents

Method for removing methyldichlorosilane and silicon tetrachloride impurities in trimethyl chlorosilane

The invention relates to a method for removing methyldichlorosilane and silicon tetrachloride impurities in trimethyl chlorosilane, which comprises a hydrosilylation reaction, a partial esterification reaction and a complete esterification reaction. Firstly, a mixture of trimethylsilyl chloride containing methyldichlorosilane and silicon tetrachloride impurities is added to a reactor for hydrosilylation reaction, and the reaction product enters a separation system. The silicon tetrachloride in the mixture is partially esterified and reacted by adding the low-carbon alcohol as an esterifying agent, and the reaction product enters a separation system. Finally, the partially esterified product is further fully esterified to valuable tetraalkoxy silicon products. The high-efficiency recycling of trimethylchlorosilane is realized, and high-value utilization is also realized.

Reaction of chloro(ethyl)silanes with chloro(phenyl)silanes in the presence of aluminum chloride. Synthesis of chloro(ethyl)(phenyl)silanes

Abstract Substituent exchange at the silicon atom between chloro(phenyl)silanes (PhSiCl3, MePhSiCl2, Ph2SiCl2) and chloro(ethyl)silanes (EtSiCl3, Et2SiCl2, Et3SiCl, Et4Si) in the presence of aluminum chloride has been studied. The examined compounds, except for PhSiCl3 and Et4Si, react fairly readily to give chloro(ethyl)-(phenyl)silanes in up to 48-52% yield. A probable mechanism has been proposed.

Quantitative substituent effects in the Grignard reaction with silanes

Kinetics of reactions of ethyl- and phenylmagnesium chlorides with chlorosilanes, RMeSiCl2, were investigated in diethyl ether under pseudo-first order conditions with a great excess of the Grignard reagent. Rate constants for alkyl substituted silanes correlate well with Es(Si) steric parameters. A good linear correlation of rate data for substituted phenyl derivates with σ0 inductive constants together with correlations of the literature data rule out the resonance effect of substituents at least in nucleophilic displacement reactions at the silicon center. An attempt to calculate the steric constants for polar substituents was made. It appeared that the inductive constants σ* derived from the carbon chemistry are not applicable to the silicon chemistry. New scales of parameters for description of polar and steric effects in the organosilicon chemistry need to be created.