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Dichlorodimethylsilane

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

Dichlorodimethylsilane Properties

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 below +30°C.
solubility 
sol chlorinated solvents and ethereal solvents; reacts with protic solvents.
form 
liquid
Specific Gravity
1.0637
color 
colorless
explosive limit
1.75-48.5%(V)
Water Solubility 
reacts
Sensitive 
Moisture Sensitive
Hydrolytic Sensitivity
8: reacts rapidly with moisture, water, protic solvents
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)
EWG's Food Scores
1
FDA UNII
8TSJ92JX69
NIST Chemistry Reference
Silane, dichlorodimethyl-(75-78-5)
EPA Substance Registry System
Dimethyldichlorosilane (75-78-5)
SAFETY
  • Risk and Safety Statements
Symbol(GHS) 
GHS02,GHS05,GHS07,GHS08,GHS09,GHS06
Signal word  Danger
Hazard statements  H319-H335-H225-H304-H314-H336-H410-H361d-H373-H302-H331
Precautionary statements  P210-P280-P301+P310-P303+P361+P353-P304+P340+P310-P305+P351+P338-P331-P261-P310-P403+P233-P260h-P405-P501a
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
Toxicity LD50 orally in Rabbit: 6056 mg/kg
NFPA 704
3
3 1
W

Dichlorodimethylsilane price More Price(23)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 8.03452 Dichlorodimethylsilane for synthesis 75-78-5 250 mL $35.52 2021-03-22 Buy
Sigma-Aldrich 40136 Dichlorodimethylsilane Selectophore 75-78-5 1ml-f $35.8 2019-12-02 Buy
Sigma-Aldrich 40136 Dichlorodimethylsilane Selectophore 75-78-5 5ml-f $76.3 2019-12-02 Buy
Sigma-Aldrich 8.03452 Dichlorodimethylsilane for synthesis 75-78-5 1 L $118.4 2021-03-22 Buy
TCI Chemical D0358 Dichlorodimethylsilane >98.0%(GC) 75-78-5 25mL $22 2020-06-24 Buy

Dichlorodimethylsilane Chemical Properties,Uses,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

Physical properties

mp ?76°C; bp 70–71°C; d 1.064 g cm?3.

Uses

Dichlorodimethylsilane can be used as additive for pinacol cyclization; protecting group for diols and carbonyl compounds;precursor for a wide variety of siliconbased reagents.
Dichlorodimethylsilane (1) allows clean pinacol cyclization of a keto aldehyde to occur without competition from an aldol reaction (eq 1).

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.]

Dichlorodimethylsilane Preparation Products And Raw materials

Raw materials

Preparation Products


Dichlorodimethylsilane Suppliers

Global( 278)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-66670886
info@dakenchem.com China 20914 58
Beijing Cooperate Pharmaceutical Co.,Ltd
010-60279497
010-60279497 sales01@cooperate-pharm.com CHINA 1817 55
Hangzhou Bayee Chemical Co., Ltd.
0086-571-86990109
0086-571-85775919 rachelhoo@bayeechem.com China 105 55
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 22607 55
ATK CHEMICAL COMPANY LIMITED
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+86 21 5161 9052/ 5187 7796 ivan@atkchemical.com CHINA 26751 60
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Hubei Jusheng Technology Co.,Ltd.
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Shanghai Worldyang Chemical Co.,Ltd.
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View Lastest Price from Dichlorodimethylsilane manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2021-11-25 Dichlorodimethylsilane
75-78-5
US $50.00 / ASSAYS 1ASSAYS 99% 500ton Shanghai Yunao International Trade Co., Ltd
2021-11-25 Dichlorodimethylsilane DMDCS
75-78-5
US $20.00 / Kg/Drum 25Kg/Drum 99.99% 1 ton per week Wuhan Mulei New Material Technology Co. Ltd
2021-11-08 Dichlorodimethylsilane
75-78-5
US $10.00 / KG 1KG 99% 20 tons Wuhan wingroup Pharmaceutical Co., Ltd

Dichlorodimethylsilane Spectrum


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