Methyldichlorosilane

Base Information

• Chemical Name: Methyldichlorosilane
• CAS No.: 75-54-7
• Molecular Formula: CH4Cl2Si
• Molecular Weight: 115.034
• Hs Code.: 29319090
• European Community (EC) Number: 200-877-1
• ICSC Number: 0297
• UN Number: 1242
• UNII: 4RYT75289H
• DSSTox Substance ID: DTXSID5026413
• Nikkaji Number: J505.742F
• Wikidata: Q1209408
• Mol file: 75-54-7.mol

Synonyms:dichloromethylsilane

Chemical Property of Methyldichlorosilane

Chemical Property:

• Appearance/Colour: Colorless clear liquid
• Vapor Pressure: 6.79 psi ( 20 °C)
• Melting Point: -93 °C
• Refractive Index: n20/D 1.398(lit.)
• Boiling Point: 38.4 °C at 760 mmHg
• Flash Point: -26 °F
• PSA: 0.00000
• Density: 1.105 g/cm³
• LogP: 1.31430
• Storage Temp.: 2-8°C
• Sensitive.: Air & Moisture Sensitive
• Solubility.: DECOMPOSES
• Water Solubility.: DECOMPOSES
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 0
• Rotatable Bond Count: 0
• Exact Mass: 112.9381070
• Heavy Atom Count: 4
• Complexity: 13.5
• Transport DOT Label: Dangerous When Wet Corrosive Flammable Liquid

Purity/Quality:

Methyldichlorosilane, min. 97% ^*data from reagent suppliers

Safty Information:

• Pictogram(s): F, T, C
• Hazard Codes: F,T,C
• Statements: 11-14/15-28-34-37-35-20/22
• Safety Statements: 16-26-36/37/39-43-45-7/8-30

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Toxic Gases & Vapors -> Chlorosilanes
• Canonical SMILES: C[Si](Cl)Cl
• Inhalation Risk: No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20 °C.
• Effects of Short Term Exposure: The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. Inhalation of the vapour may cause lung oedema. Exposure could cause death. Medical observation is indicated.
• Description: Methyl dichlorosilane, is a colorless liquid with a sharp irritating odor. It is a dangerous fire risk, corrosive, and water reactive. The flammable range is wide, from 6% on the lower end to 55% on the upper end. Boiling point is 107°F (41°C), flash point is 15°F (?9°C), and ignition temperature is more than 600°F (315°C). Specific gravity is 1.11, which is heavier than water. Vapors are heavier than air and will travel to ignition sources. It is immiscible in water and decomposes on contact to release hydrogen chloride gas. Methyl dichlorosilane is toxic by inhalation and skin absorption; it is irritating to the skin, eyes, and respiratory system. Contact with the material may cause burns to the eyes and skin. The four-digit UN identification number is 1242. The NFPA 704 designation is health 3, flammability 3, and reactivity 2. The white space at the bottom of the diamond has a W with a slash through it, indicating water reactivity. The primary use is in the manufacture of siloxanes, which are straight-chained compounds similar to paraffin hydrocarbons.
• Uses: Dichloromethylsilane is a monomer ('building block') in the production of silicone polymers. An intermediate (starting material) in the production of other organic and inorganic chemicals. In the electronics industry for the production of ultra-pure polysilicon and in the manufacture of semiconductors and photovoltaics.

Technology Process of Methyldichlorosilane

There total 108 articles about Methyldichlorosilane which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 28.2%

Methyltrichlorosilane (75-79-6) → Dichloromethylsilane (75-54-7) + tetrachlorosilane (10026-04-7,53609-55-5) + trichlorosilane (10025-78-2)

Guidance literature:

With hydrogen; Rh/C; at 700 ℃; Product distribution / selectivity;

Reference yield: 5.1%

Methyltrichlorosilane (75-79-6) → Dichloromethylsilane (75-54-7) + tetrachlorosilane (10026-04-7,53609-55-5)

Guidance literature:

With hydrogen; Rh/C; at 600 ℃; Product distribution / selectivity;

Reference yield:

silicon (7440-21-3) → Dichloromethylsilane (75-54-7) + chloro-trimethyl-silane (75-77-4) + Methyltrichlorosilane (75-79-6) + trichlorosilane (10025-78-2) + dimethylsilicon dichloride (75-78-5,30107-43-8)

Guidance literature:

With methylene chloride; In neat (no solvent); passing CH3Cl over Si powder at about 300°C; further products;; mixt. obtained;;

upstream raw materials:

Methyltrichlorosilane

methylsilane

methylene chloride

methylmagnesium chloride

Downstream raw materials:

1,4-dichlorobutane

dichloro(2-cyanoethyl)methylsilane

chloro-methyl-silane

1,3,3,5,5,7,7-heptamethyl-1,3,5,7-cyclotetrasiloxane

Refernces

• 1、 Richter, Robin,Schulze, Norbert,Roewer, Gerhard,Albrecht, Jens. "Synthesis and application of immobilized catalysts for the heterogeneously catalyzed cleavage of the Si-Si bond of chloromethyldisilanes". . p. 145 - 151. Retrieved 1997.
• 2、 Ai, Liqing,Chen, Yi,Li, Yongming,Xu, Caihong. "Borohydride catalyzed redistribution reaction of hydrosilane and chlorosilane: A potential system for facile preparation of hydrochlorosilanes". . p. 17404 - 17407. Retrieved 2020/06/19.
• 3、 -. "CLEAVAGE OF METHYLDISILANES TO METHYLMONOSILANES". Page/Page column 25; 27; 28. . Retrieved 2019/04/16.