Ethyltrichlorosilane Chemical Properties

Melting point:

−106 °C(lit.)

Boiling point:

99 °C(lit.)

Density 

1.238 g/mL at 25 °C(lit.)

vapor pressure 

36 hPa (20 °C)

refractive index 

n20/D 1.425(lit.)

Flash point:

57 °F

storage temp. 

Store below +30°C.

solubility 

soluble in Ether,Benzene

form 

liquid

Specific Gravity

1.238

color 

colorless

explosive limit

2.68%(V)

Hydrolytic Sensitivity

8: reacts rapidly with moisture, water, protic solvents

Sensitive 

moisture sensitive

CAS DataBase Reference

115-21-9(CAS DataBase Reference)

NIST Chemistry Reference

Ethyltrichlorosilane(115-21-9)

EPA Substance Registry System

Trichloroethylsilane (115-21-9)

Safety Information

Hazard Codes 

F,T+,C

Risk Statements 

11-14-22-26-34-37-35-20/22

Safety Statements 

26-28-36/37/39-45

RIDADR 

UN 1196 3/PG 2

WGK Germany 

1

RTECS 

VV4200000

F 

19-21

Autoignition Temperature

385 °C

TSCA 

Yes

HS Code 

2931 90 00

HazardClass 

3.1

PackingGroup 

II

Hazardous Substances Data

115-21-9(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: 1330 mg/kg

MSDS

• Language:English Provider:Ethyltrichlorosilane
• Language:English Provider:SigmaAldrich

Ethyltrichlorosilane Usage And Synthesis

Chemical Properties

clear colorless liquid

Chemical Properties

Ethyl trichlorosilane is a colorless liquid with an irritating odor

Uses

Intermediate for silicones.

Production Methods

Manufactured by reaction of ethylene and trichlorosilane in the presence of a peroxide catalyst.

General Description

A colorless fuming liquid with a pungent odor. Flash point 57°F. Boiling point 211.1°F (99.5°C). Vapor and liquid may cause burns. Denser than water. Vapors heavier than air.

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

Highly flammable

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.

Ethyltrichlorosilane(115-21-9)Related Product Information

• Phenyltrichlorosilane
• Silicon tetrahydride
• Trichlorosilane
• (Triacetoxy)ethylsilane
• (Chloromethyl)trichlorosilane
• ISOXADIFEN-ETHYL
• Ethyl acetate
• 2-Ethoxyethanol
• ISOBUTYLTRICHLOROSILANE
• Trichlorovinylsilane
• Ethanol
• Trinexapac-ethyl
• ISOPROPYLTRICHLOROSILANE
• Trichloropropylsilane
• Ethylparaben
• Triethylsilane
• N-OCTADECYLTRICHLOROSILANE
• Methyltrichlorosilane