115-21-9 Usage
Description
Ethyltrichlorosilane is a colorless fuming liquid with a pungent odor, characterized by a flash point of 57°F and a boiling point of 211.1°F (99.5°C). It is denser than water, and its vapors are heavier than air, which may cause burns upon contact. As a clear colorless liquid, it possesses an irritating odor and is used as an intermediate in the production of silicones.
Uses
Used in Chemical Industry:
Ethyltrichlorosilane is used as an intermediate for the production of silicones due to its chemical properties and reactivity with other compounds. Its ability to form stable bonds with silicon makes it a valuable component in the synthesis of various silicone products.
Used in Silicone Production:
Ethyltrichlorosilane is used as a key component in the manufacturing process of silicones for its ability to react with other elements and form stable silicone compounds. These silicones find applications in a wide range of industries, including automotive, construction, electronics, and personal care products, due to their unique properties such as heat resistance, flexibility, and water repellency.
Production Methods
Manufactured by reaction of ethylene and trichlorosilane in
the presence of a peroxide catalyst.
Reactivity Profile
Chlorosilanes, such as Ethyltrichlorosilane, 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, may form
explosive mixture with air. A strong irritant.
Health Hazard
Vapor and liquid cause burns. Do not inhale or expose eyes to vapor. Vapor may damage eyes even if not immediately painful.
Fire Hazard
Trichloroethylsilane may form explosive mixtures with air. Its vapors are heavier than air and may travel a considerable distance to a source of ignition and flash back. Form toxic and corrosive fumes including phosgene when heated to decomposition and hydrochloric acid in presence of water. Will react with water or steam to produce heat and toxic and corrosive fumes. Will react vigorously with oxidizing materials. Unstable, avoid decomposing heat.
Flammability and Explosibility
Highlyflammable
Safety Profile
Poison by inhalation
and intraperitoneal routes. Moderately toxic
by ingestion. A skin and severe eye irritant.
A very dangerous fire hazard when exposed
to heat, flame, or oxidizers; will react with
water or steam to produce heat and toxic
and corrosive fumes; can react vigorously
with oxidizing materials. To fight fire, use
CO2, dry chemical. When heated to decom position it emits highly toxic fumes of Cl
and phosgene. See also
CHLOROSILANES.
Potential Exposure
Used in the manufacture of silicone
polymers.
Shipping
UN1196 Ethyltrichlorosilane, Hazard Class: 3;
Labels: 3-Flammable liquid, 8-Corrosive material.
Incompatibilities
A strong reducing agent. 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 115-21-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,1 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 115-21:
(5*1)+(4*1)+(3*5)+(2*2)+(1*1)=29
29 % 10 = 9
So 115-21-9 is a valid CAS Registry Number.
InChI:InChI=1/C2H5Cl3Si/c1-2-6(3,4)5/h2H2,1H3
115-21-9Relevant articles and documents
Kinetics of Gas Phase Addition Reactions of Trichlorosilyl Radicals. IV. Relative Rates of Additions to 1-Alkenes
Dohmaru, Takaaki,Nagata, Yoshio
, p. 323 - 324 (1982)
Trichlorosilyl radical additions to a mixture of ethene, propene, 1-butene, and 1-pentene and to a mixture of propene and 2-methylpropene have been investigated.The rate of adduct formation from each olefin was obtained relative to that from propene between 403 K and 548 K.These relative rates are in good agreement with those calculated from the rate parameters obtained previously in this laboratory.
Kiso et al.
, p. 105 (1972)
Potassium Alkylpentafluorosilicates, Primary Alkyl Radical Precursors in the C-1 Alkylation of Tetrahydroisoquinolines
Wang, Teng,Wang, Dong-Hui
supporting information, p. 3981 - 3985 (2019/06/14)
In this study, we demonstrate that potassium alkylpentafluorosilicates (RSiF5K2) are efficient primary alkyl radical precursors for selective C(sp3)-C(sp3) bond-forming reactions. RSiF5K2 reagents are white, free-flowing solids and are moisture and air stable. This class of reagents enables the direct C-1 alkylation of tetrahydroisoquinolines under mild conditions via single-electron transfer. The broad substrate scope of both alkylpentafluorosilicates and tetrahydroisoquinolines is tolerated in this transformation. Both radical scavenger and EPR capture experiments show that the primary radical is generated by the oxidation of RSiF5K2. A mechanism involving alkyl radical addition to an iminium salt followed by reduction by an amine is proposed.
PREPARATION OF ORGANOHALOSILANES
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Page/Page column 17-18, (2011/12/14)
A process for preparing organohalosilanes comprising combining hydrogen, a halosilane having the formula HaSiX4-a (I), and an organohalide having the formula RX (II), wherein R is C1-C10 alkyl or C4-C10 cycloalkyl, each X is independently halo, and the subscript a is 0, 1, or 2, in the presence of a sufficient amount of a catalyst effective in enabling the replacement of one or more of the halo groups of the halosilane with the R group from the organohalide, at a temperature from 200 to 800 °C, to form an organohalosilane and a hydrogen halide, wherein the volumetric ratio of hydrogen to halosilane is from 1 :3 to 1 :0.001 and the volumetric ratio of hydrogen to organohalide is from 1 : 1 to 1 :0.001, and wherein the catalyst is optionally treated with the hydrogen or the halosilane prior to the combining.
