Description History Preparation Applications
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Dichlorodimethylsilane

Description History Preparation Applications
Product Name
Dichlorodimethylsilane
CAS No.
75-78-5
Chemical Name
Dichlorodimethylsilane
Synonyms
DMDCS;ls130;AW-DMCS;Inerton;Me2SiCl2;SILANE M2;(CH3)2SiCl2;repel-silan;Sylon CTTM;inertondw-dmc
CBNumber
CB8854243
Molecular Formula
C2H6Cl2Si
Formula Weight
129.06
MOL File
75-78-5.mol
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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)
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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
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H225Highly Flammable liquid and vapour

H302Harmful if swallowed

H304May be fatal if swallowed and enters airways

H314Causes severe skin burns and eye damage

H319Causes serious eye irritation

H331Toxic if inhaled

H335May cause respiratory irritation

H336May cause drowsiness or dizziness

H373May cause damage to organs through prolonged or repeated exposure

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P310Immediately call a POISON CENTER or doctor/physician.

P331Do NOT induce vomiting.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
8.03452
Product name
Dichlorodimethylsilane
Purity
for synthesis
Packaging
250 mL
Price
$35.52
Updated
2021/03/22
Sigma-Aldrich
Product number
40136
Product name
Dichlorodimethylsilane
Purity
Selectophore
Packaging
1ml-f
Price
$35.8
Updated
2019/12/02
Sigma-Aldrich
Product number
40136
Product name
Dichlorodimethylsilane
Purity
Selectophore
Packaging
5ml-f
Price
$76.3
Updated
2019/12/02
Sigma-Aldrich
Product number
8.03452
Product name
Dichlorodimethylsilane
Purity
for synthesis
Packaging
1 L
Price
$118.4
Updated
2021/03/22
TCI Chemical
Product number
D0358
Product name
Dichlorodimethylsilane
Purity
>98.0%(GC)
Packaging
25mL
Price
$22
Updated
2020/06/24
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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.]

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Dichlorodimethylsilane Suppliers

Shanghai Worldyang Chemical Co.,Ltd.
Tel
+86-21-56791066;56795766;56795797
Fax
+86-21-56795266
Email
sales@worldyachem.com
Country
China
ProdList
9354
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
Liaocheng Yuze Chemical Products Co., Ltd.
Tel
;
Email
13589473332@163.com;13589473332@163.com
Country
China
ProdList
28
Advantage
58
J & K SCIENTIFIC LTD.
Tel
010-82848833- ;010-82848833-
Fax
86-10-82849933
Email
jkinfo@jkchemical.com;market6@jkchemical.com
Country
China
ProdList
96815
Advantage
76
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
21-61259100-
Fax
86-21-61259102
Email
sh@meryer.com
Country
China
ProdList
40264
Advantage
62
New Energy Chemicals
Tel
0515-82159088- ;0515-82308526-
Fax
86-0515-8215909
Email
twl@njuchem.com;info@njuchem.com
Country
China
ProdList
411
Advantage
65
Alfa Aesar
Tel
400-610-6006; 021-67582000
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
Country
China
ProdList
30159
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
Email
sales8178@energy-chemical.com
Country
China
ProdList
42923
Advantage
61
Beijing Ouhe Technology Co., Ltd
Tel
010-82967028-
Fax
+86-10-82967029
Email
2355560935@qq.com
Country
China
ProdList
12282
Advantage
60
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View Lastest Price from Dichlorodimethylsilane manufacturers

Wuhan wingroup Pharmaceutical Co., Ltd
Product
Dichlorodimethylsilane 75-78-5
Price
US $10.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
20 tons
Release date
2021-07-02
Hebei Dongdu Import and Export Co. LTD
Product
Dichlorodimethylsilane 75-78-5
Price
US $2.50/Kg/Drum
Min. Order
16T
Purity
99.5%
Supply Ability
2000tons/month
Release date
2020-11-30
Hebei Yanxi Chemical Co., Ltd.
Product
Dichlorodimethylsilane 75-78-5
Price
US $2.50/Kg/Drum
Min. Order
16T
Purity
99.5%
Supply Ability
2000tons/month
Release date
2020-07-03

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