Trichlorosilane

CAS NO.：10025-78-2
Empirical Formula: Cl3HSi
Molecular Weight: 135.45
MDL number: MFCD00011518
EINECS: 233-042-5
SAFETY DATA SHEET (SDS)
Update Date: 2023-09-04 14:20:59

What is Trichlorosilane?

Chemical properties

Clear liquid with acrid odor of hydrogen chloride. soluble in carbon disulfide, carbon tetrachloride, chloroform, benzene, etc.

The Uses of Trichlorosilane

Trichlorosilane is used in process of hydrosilylation. It is also used for reductive hydrazination which is a high yielding method for preparation of 1,1-disubstituted hydrazines.

The Uses of Trichlorosilane

In organic synthesis.

General Description

A colorless fuming liquid with a pungent odor. Flash point 7°F. Vapor and liquid cause burns. More dense than water. Vapors are heavier than air.

Air & Water Reactions

Highly flammable. Ignites spontaneously in air [NFPA, 1991]. Reacts violently with water, steam, moisture in air to generate heat and flammable (H2) and corrosive (HCl) gases. [Handling Chemicals Safely 1980. p. 924].

Reactivity Profile

Trichlorosilane reacts with alcohols, acetone, light metals with generation of heat and combustible (H2) and corrosive (HCl) gases [Handling Chemicals Safely 1980. p. 924].

Health Hazard

Inhalation causes severe irritation of respiratory system. Liquid causes severe burns of eyes and skin. Ingestion causes severe burns of mouth and stomach.

Flammability and Explosibility

Substances and mixtures which in contact with water emit flammable gases

Safety Profile

Moderately toxic by ingestion and inhalation. A corrosive irritant to skin, eyes, and mucous membranes. A very dangerous fire hazard when exposed to heat, flame, or by chemical reaction. May be ignited by spark or impact. Spontaneously flammable in air. Explosive reaction with acetonitrile + diphenyl sulfoxide. 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 decomposition it emits toxic fumes of Cl-. See also CHLOROSILANES.

Properties of Trichlorosilane

Melting point:	-127 °C
Boiling point:	32-34 °C(lit.)
Density	1.342 g/mL at 25 °C(lit.)
vapor density	1 (vs air)
vapor pressure	9.75 psi ( 20 °C)
refractive index	1.4-1.402
Flash point:	7 °F
storage temp.	Refrigerator
solubility	Soluble in benzene, ether, heptane, chloroform and carbon tetrachloride.
form	Liquid
color	Colorless
Specific Gravity	1.342
Odor	Sharp, choking, like hydrochloric acid.
explosive limit	70%
Water Solubility	decomposes
Sensitive	Air & Moisture Sensitive
Hydrolytic Sensitivity	8: reacts rapidly with moisture, water, protic solvents
Merck	14,9646
Stability:	Stable, but extremely flammable. Pyrophoric - spontaneously ignites in air. Explosion hazard in air - note wide explosion limits. Reacts violently with water. Incompatible with moisture, acids, bases, strong oxidizing agents, alcohols, amines.
CAS DataBase Reference	10025-78-2(CAS DataBase Reference)
NIST Chemistry Reference	Trichlorosilane(10025-78-2)
EPA Substance Registry System	Trichlorosilane (10025-78-2)

Safety information for Trichlorosilane

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02 Corrosion Corrosives GHS05 Skull and Crossbones Acute Toxicity GHS06
GHS Hazard Statements	H224:Flammable liquids H250:Pyrophoric liquids; Pyrorophoric solids H302:Acute toxicity,oral H314:Skin corrosion/irritation H331:Acute toxicity,inhalation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233:Keep container tightly closed. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P403+P233:Store in a well-ventilated place. Keep container tightly closed.