ChemicalBook > CAS DataBase List > Dichlorodimethylsilane

Dichlorodimethylsilane

Product Name:
Dichlorodimethylsilane
CAS No.
75-78-5
Chemical Name:
Dichlorodimethylsilane
CBNumber:
CB8854243
Molecular Formula:
C2H6Cl2Si
Formula Weight:
129.06
MOL File:
75-78-5.mol
More
Less

Dichlorodimethylsilane Property

Melting point:
-76 °C
Boiling point:
70 °C(lit.)
Density 
1.333 g/mL at 20 °C
vapor pressure 
<200 hPa (20 °C)
refractive index 
n20/D 1.500
Flash point:
3 °F
storage temp. 
Store at 0-5°C
form 
liquid
Specific Gravity
1.0637
color 
colorless
explosive limit
1.75-48.5%(V)
Water Solubility 
reacts
Hydrolytic Sensitivity
8: reacts rapidly with moisture, water, protic solvents
Sensitive 
Moisture Sensitive
BRN 
605287
Stability:
Stable. Reacts violently with water and alcohols. Highly flammable. Incompatible with strong oxidizing agents, water, alcohols, caustics, ammonia.
CAS DataBase Reference
75-78-5(CAS DataBase Reference)
NIST Chemistry Reference
Silane, dichlorodimethyl-(75-78-5)
EPA Substance Registry System
Dimethyldichlorosilane (75-78-5)
More
Less

Safety

Hazard Codes 
Xn,Xi,F,N,C
Risk Statements 
20-59-36/37/38-11-67-65-63-48/20-38-20/21-50/53-37-35-20/22-14-34
Safety Statements 
60-61-62-36/37-59-45-36/37/39-26-16-7/9-2
RIDADR 
UN 2924 3/PG 2
WGK Germany 
3
RTECS 
VV3150000
3-10-19-21
Autoignition Temperature
425 °C
TSCA 
Yes
HazardClass 
3
PackingGroup 
II
HS Code 
29310095
Hazardous Substances Data
75-78-5(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 6056 mg/kg
More
Less

N-Bromosuccinimide Price More Price(21)

Sigma-Aldrich Gold
Product number:
40136
Product name :
Dichlorodimethylsilane
Purity:
Selectophore
Packaging:
1ml-f
Price:
$35.8
Updated:
2019/12/02
Buy:
Buy
Sigma-Aldrich Gold
Product number:
40136
Product name :
Dichlorodimethylsilane
Purity:
Selectophore
Packaging:
5ml-f
Price:
$76.3
Updated:
2019/12/02
Buy:
Buy
TCI Chemical Gold
Product number:
D0358
Product name :
Dichlorodimethylsilane
Purity:
>98.0%(GC)
Packaging:
25mL
Price:
$22
Updated:
2020/06/24
Buy:
Buy
Alfa Aesar Gold
Product number:
L12133
Product name :
Dichlorodimethylsilane, 99%
Packaging:
100g
Price:
$38.4
Updated:
2020/06/24
Buy:
Buy
Alfa Aesar Gold
Product number:
L12133
Product name :
Dichlorodimethylsilane, 99%
Packaging:
500g
Price:
$42.1
Updated:
2020/06/24
Buy:
Buy
More
Less

Dichlorodimethylsilane Chemical Properties,Usage,Production

Description

Dichlorodimethylsilane is a tetrahedral, organosilicon compound with the molecular formula Si(CH3)2Cl2. The compound is a colorless liquid at room temperature, has a pungent odor and readily reacts with water to form both cyclic and linear Si-O chains. On an industrial scale, dichlorodimethylsilane is manufactured as the main precursor to polysilane and dimethylsilicone compounds.

History

James Crafts and Charles Friedel are American chemists who first reported organosilicon compounds in 1863 by synthesizing tetraethylsilane from silicon tetrachloride and diethylzinc. Nevertheless, major progress in organosilicon chemistry occurred when Fredrick Kipping and his students reacted tetrachloride with Grignard reagents to produce diorganodichlorosilanes (R2SiCl2), which they used for their experiments. The dpemand for silicones increased in the 1930s as many aircraft companies needed better insulators for sealing materials and electric motors for aircraft engines; therefore, there was need for efficient synthesis of dichlorodimethylsilane.

Preparation

Dichlorodimethylsilane is prepared by passing methyl chloride through a heated tube packed with copper (I) chloride and ground silicon using Cu2O as the catalyst. Methyl chloride is the passed through a reactor to produce dichlorodimethylsilane.
2 CH3Cl + Si → (CH3)2SiCl2
The other products in this reaction apart from dichlorodimethylsilane include CH3)3SiCl, CH3SiHCl2, and CH3SiCl3, which can be separated fromone another by fractional distillation.

Applications

Dichlorodimethylsilane is majorly used in the production of silicones. Moreover, it is utilized in the synthesis of polysilanes, which are the main precursors to silicon carbide. Dichlorodimethylsilane can be used to coat glass to prevent the adsorption of micro-particles.

Chemical Properties

Colorless to brown liquid

Uses

Dichlorodimethylsilicon is a organosilicon compound and is the precursor to dimethylsilicone and polysilane compounds.

Production Methods

Produced by the action of silicon on methyl chloride in presence of copper catalyst, or by Grignard reaction from methyl chloride and silicon tetrachloride.

General Description

A colorless fuming liquid with a pungent odor. Flash point 16°F. Vapor and liquid may cause burns. Denser than water. Vapors heavier than air.

Reactivity Profile

Chlorosilanes, such as Dichlorodimethylsilane, are compounds in which silicon is bonded to from one to four chlorine atoms with other bonds to hydrogen and/or alkyl groups. Chlorosilanes react with water, moist air, or steam to produce heat and toxic, corrosive fumes of hydrogen chloride. They may also produce flammable gaseous H2. They can serve as chlorination agents. Chlorosilanes react vigorously with both organic and inorganic acids and with bases to generate toxic or flammable gases.

Health Hazard

Inhalation irritates mucous membranes. Severe gastrointestinal damage may occur. Vapors cause severe eye and lung injury. Upon short contact, second and third degree burns may occur.

Fire Hazard

Vapor may explode if ignited in an enclosed area. Reacts vigorously with water to generate hydrogen chloride. Hydrogen chloride and phosgene gases may be formed upon heating or in fire. Runoff to sewer may create fire or explosion hazard.

Safety Profile

Poison by ingestion and intraperitoneal routes. Moderately toxic by inhalation. A skin and severe eye irritant. Violent reaction on contact with water. When heated to decomposition it emits toxic fumes of Cl-. See also CHLOROSILANES.

Purification Methods

Other impurities are chlorinated silanes and methylsilanes. Fractionate it through a 3/8in diameter 7ft Stedman column (p 11) rated at 100 theoretical plates at almost total reflux. See purification of MeSiCl2. Solutions in heptane, 1,1,1-trichloroethane or 1-chloronaphthalene are used for the silanization of glassware and pipettes. [Sauer & Hadsell J Am Chem Soc 70 3590 1948, Beilstein 4 IV 4110.]

Less

Dichlorodimethylsilane Suppliers

Global(247)Suppliers
Sigma-Aldrich
Tel:
021-61415566- ;
Email:
orderCN@merckgroup.com;orderCN@merckgroup.com
Country:
China
ProdList:
34129
Advantage:
80
Shanghai Worldyang Chemical Co.,Ltd.
Tel:
+86-21-56791066,56795766,56795797
Fax:
+86-21-56795266
Email:
sales@worldyachem.com
Country:
China
ProdList:
9109
Advantage:
58
Hangzhou Bayee Chemical Co., Ltd.
Tel:
0086-571-86990109; 0086-18605816692
Fax:
0086-571-85775919
Email:
rachelhoo@bayeechem.com
Country:
China
ProdList:
105
Advantage:
55
J & K SCIENTIFIC LTD.
Tel:
010-82848833- ;010-82848833-
Fax:
86-10-82849933
Email:
jkinfo@jkchemical.com;market6@jkchemical.com
Country:
China
ProdList:
96504
Advantage:
76
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel:
21-61259100-
Fax:
86-21-61259102
Email:
sh@meryer.com
Country:
China
ProdList:
40268
Advantage:
62
New Energy Chemicals
Tel:
0515-82159088- ;0515-82159099;0515-82159098
Fax:
86-0515-8215909
Email:
twl@njuchem.com;info@njuchem.com;gb@njuchem.com;
Country:
China
ProdList:
409
Advantage:
65
Alfa Aesar
Tel:
400-610-6006; 021-67582000
Fax:
021-67582001/03/05
Email:
saleschina@alfa-asia.com
Country:
China
ProdList:
30163
Advantage:
84
TCI (Shanghai) Development Co., Ltd.
Tel:
021-67121386 / 800-988-0390
Fax:
021-67121385
Email:
Sales-CN@TCIchemicals.com
Country:
China
ProdList:
24555
Advantage:
81
Energy Chemical
Tel:
021-58432009
Fax:
021-58436166-800
Email:
sales8178@energy-chemical.com
Country:
China
ProdList:
44026
Advantage:
61

75-78-5, DichlorodimethylsilaneRelated Search:

DI-TERT-BUTYLDICHLOROSILANE VINYLPHENYLDICHLOROSILANE (3,3,3-Trifluoropropyl)dichloromethylsilane Dichloromethylphenylsilane BIS(3-CHLOROPROPYL)DICHLOROSILANE 3-ISOCYANATOPROPYLMETHYLDICHLOROSILANE N-AMYLMETHYLDICHLOROSILANE N-HEXYLMETHYLDICHLOROSILANE 2-CYANOETHYLMETHYLDICHLOROSILANE 3-CYANOPROPYLMETHYLDICHLOROSILANE Chloromethyldichloromethylsilane Dichlorodimethylsilane Dimethyldimethoxysilane Dichlorodiphenylsilane Diethoxydimethylsilane DIMETHYLSILANE Chlorodimethylphenylsilane tert-Butyldimethylsilyl chloride
  • (CH3)2SiCl2
  • dichlorodimethyl-silan
  • Dichlorodimethylsilicon
  • dimethyldichlorosilicane
  • Dimethyl-dichlorsilan
  • SILANE M2
  • SILANISATION SOLUTION
  • SILANIZATION SOLUTION I
  • SILANIZATION SOLUTION II
  • GLASS-PREP(TM)
  • FLUKA GEL REPEL I
  • FLUKA GEL REPEL II
  • DICHLORODIMETHYLSILANE
  • DICHLORODIMETHYLSILICANE
  • DIMETHYLSILICON DICHLORIDE
  • DIMETHYLDICHLOROSILANE
  • DMDCS
  • DOW CORNING(TM) PRODUCT Z-1219
  • DOW CORNING Z-1219 CHLOROSILANE
  • Dimethylsilyl dichloride
  • silanization sol. ii
  • SILANIZATION SOL. II, 2% DIME.-DICHLORO- SILANE IN TRICHL.-E
  • DICHLORODIMETHYLSILANE, WACKER-QUALITY
  • Dichlorodimethylsilane, >=99.5%
  • DIMETHYLDICHLOROSILANE 99+% FOR CHROMATOGRAPHY
  • SILANIZATION SOLUTION I, 5% DICHLORODIME .-SILANE IN N-HEPT.
  • Dichlorodimethylsilane, 99+%
  • Dimethyldichlorosilane(dichlorodimethylsilane)
  • DichloroMethylsilane, 99+%, AcroSeal
  • DICHLORODIMETHYLSILANE FOR SYNTHESIS
  • Two Methyltwo chlorosilane
  • DichlorodiMethylsilane >=98.5% (GC)
  • DichlorodiMethylsilane, 99%, SpcSeal
  • Dichlorodimethylsilane produced by Wacker Chemie AG, Burghausen, Germany, >=99.0% (GC)
  • BHI BROTH MODIFIED 10X100ML
  • Dichlorodimethylsilane, 99.3%
  • DICHLORODIMETHYSILANE
  • dimethyl-dichlorsilan(czech)
  • Dimethyldichlorsilane
  • dimethylsilanedichloride
  • Inerton Aw-dmcs
  • inertonaw-dmcs
  • inertondw-dmc
  • ls130
  • repel-silan
  • Silane,dichlorodimethyl-
  • DICHLORODIMETHYLSILANE,REAGENT
  • DIMETHYLDICHLOROSILANE - SOLUTION (5 %)
  • Dimethyldichlorosilane,99%
  • dichlorodimethylsilane solution
  • dichlorodimethylsilane, tech.
  • DIMETHYL DICHLOROSILANE pure
  • Dimethyldichlorosilane, DMDCS
  • Dichlorodimethylsilane solution, Dimethyldichlorosilane solution
  • Sylon CTTM
  • Dimethyldichlorosilane, DMDCS, Silane M2
  • Dimethyldichlorosilane, DMDCS, Dow Corning(R) product Z-1219
  • Dichlorodimethylsilane solution, Dimethyldichlorosilane solution, Dimethyldichlorosilane/o-Xylene 1/19 (v/v)
Description History Preparation Applications