1789-58-8 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 1789-58-8 differently. You can refer to the following data:
1. Colorless liquid.Readily
hydrolyzed by moisture, with the liberation of
hydrogen and hydrogen chloride.
2. Ethyl dichlorosilane is a colorless liquid.
Sharp, irritating odor
Uses
Intermediate for silicones.
Application
Will form high-boiling polymeric by-products with aqueous
work-up.
General Description
A colorless fuming liquid with a pungent odor. Flash point 30°F. Vapor and liquid may cause burns. Denser than water. Vapors heavier than air.
Air & Water Reactions
Highly flammable. Based on the properties of similar materials, there is the possibility that the reaction of Ethyldichlorosilane with water may be vigorous or violent. Products of the reaction include hydrogen chloride. The reaction generates heat and this heat may be sufficient to ignite the product. The chlorosilicon hydrides(ClxSiHy) are spontaneously flammable in air [NFPA 1991].
Reactivity Profile
Chlorosilanes, such as Ethyldichlorosilane, 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.
Hazard
Flammable, dangerous fire risk. Strong irritant to eyes and skin.
Health Hazard
Inhalation irritates mucous membranes. Contact with liquid causes severe burns of eyes and skin. Ingestion causes severe burns of mouth and stomach.
Chemical Reactivity
Reactivity with Water Reacts vigorously, evolving hydrogen chloride (hydrochloric acid); Reactivity with Common Materials: Reaction with surface moisture will generate hydrogen chloride, which corrodes common metals; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Flood with water, rinse with sodium bicarbonate or lime solution; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
Safety Profile
Poison by ingestion and
inhalation. A severe irritant to skin, eyes,
and mucous membranes. Corrosive.
Dangerous fire hazard if exposed to heat,
open flames, or powerful oxidizers. Will
react with water or steam to produce heat
and toxic and corrosive fumes. To fight fire,
use foam, dry chemical, mist, spray. When
heated to decomposition it emits toxic
fumes of Cland phosgene. See also
CHLOROSILANES.
Potential Exposure
This material is used in silicone polymer manufacture.
Shipping
UN1183 Ethyldichlorosilane, Hazard Class: 4.3;
Labels: 4.3-Dangerous when wet material; 8-Corrosive
material
Incompatibilities
Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases,
strong acids, oxoacids, and epoxides. Chlorosilanes react
vigorously with bases and both organic and inorganic acids
generating toxic and/or flammable gases. Chlorosilanes
react with water, moist air, or steam to produce heat and
toxic, corrosive fumes of hydrogen chloride. They may also
produce flammable gaseous hydrogen. Attacks metals in
the presence of moisture
Check Digit Verification of cas no
The CAS Registry Mumber 1789-58-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,8 and 9 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1789-58:
(6*1)+(5*7)+(4*8)+(3*9)+(2*5)+(1*8)=118
118 % 10 = 8
So 1789-58-8 is a valid CAS Registry Number.
InChI:InChI=1/C2H5Cl2Si/c1-2-5(3)4/h2H2,1H3
1789-58-8Relevant articles and documents
Direct synthesis of organochlorosilanes by the reaction of metallic silicon with hydrogen chloride and alkene/alkyne
Okamoto, Masaki,Onodera, Satoshi,Yamamoto, Yuji,Suzuki, Eiichi,Ono, Yoshio
, p. 1275 - 1276 (1998)
Organosilicon compounds were directly synthesized from metallic silicon, alkene/alkyne and HCl, EtHSiCl2 being obtained with 47% selectivity from Si, C2H4 and HCl at 513 K, and CH2=CHSiHCl2 and EtHSiC
Lewis Base Catalyzed Selective Chlorination of Monosilanes
Sturm, Alexander G.,Schweizer, Julia I.,Meyer, Lioba,Santowski, Tobias,Auner, Norbert,Holthausen, Max C.
supporting information, p. 17796 - 17801 (2018/11/23)
A preparatively facile, highly selective synthesis of bifunctional monosilanes R2SiHCl, RSiHCl2 and RSiH2Cl is reported. By chlorination of R2SiH2 and RSiH3 with concentrated HCl/ether solutions, the stepwise introduction of Si?Cl bonds is readily controlled by temperature and reaction time for a broad range of substrates. In a combined experimental and computational study, we establish a new mode of Si?H bond activation assisted by Lewis bases such as ethers, amines, phosphines, and chloride ions. Elucidation of the underlying reaction mechanisms shows that alcohol assistance through hydrogen-bond networks is equally efficient and selective. Remarkably, formation of alkoxysilanes or siloxanes is not observed under moderate reaction conditions.
Direct synthesis of organodichlorosilanes by the reaction of metallic silicon, hydrogen chloride and alkene/alkyne and by the reaction of metallic silicon and alkyl chloride
Okamoto, Masaki,Onodera, Satoshi,Yamamoto, Yuji,Suzuki, Eiichi,Ono, Yoshio
, p. 71 - 78 (2007/10/03)
Dichloroethylsilane was synthesized by the reaction of metallic silicon, hydrogen chloride and ethylene using copper(I) chloride as the catalyst, the silicon conversion and the selectivity for dichloroethylsilane being 36 and 47%, respectively. At a lower reaction temperature or at a higher ratio of ethylene: hydrogen chloride a higher selectivity was obtained, however the silicon conversion was lower. The silicon-carbon bond formation is caused by the reaction of a surface silylene intermediate with ethylene. The reaction with propylene in place of ethylene gave dichloroisopropylsilane (22% selectivity) and dichloro-n-propyl-silane (8% selectivity) together with chlorosilanes. A part of the dichloroisopropylsilane is formed by the reaction of silicon, hydrogen chloride and isopropyl chloride formed by hydrochlorination of propylene. Use of acetylene instead of alkenes resulted in dichlorovinylsilane formation with a 34% selectivity. Alkyldichlorosilanes were also produced directly from silicon with alkyl chlorides, propyl and butyl chlorides. During the reaction the alkyl chloride is dehydrochlorinated over the surface of copper originating from the catalyst to afford hydrogen chloride and alkene. The hydrogen chloride formed participates in the formation of the silicon-hydrogen bond in alkyldichlorosilane, and the reaction of silicon, hydrogen chloride and alkene also causes alkyldichlorosilane formation. The reaction with isopropyl chloride gave a very high selectivity (85%) for dichloroisopropylsilane, the silicon conversion being 86%. The Royal Society of Chemistry 2001.
