Tetramethylsilane Property

Melting point:

-99 °C (lit.)

Boiling point:

26-28 °C (lit.)

Density 

0.648 g/mL at 25 °C (lit.)

vapor pressure 

11.66 psi ( 20 °C)

refractive index 

n20/D 1.358(lit.)

RTECS 

VV5706000

Flash point:

−17 °F

storage temp. 

2-8°C

solubility 

0.02g/l

form 

liquid

Specific Gravity

0.648

color 

colorless

explosive limit

1.0-37.9%(V)

Water Solubility 

0.02 G/L (25 ºC)

Hydrolytic Sensitivity

1: no significant reaction with aqueous systems

Merck 

14,9229

BRN 

1696908

Dielectric constant

1.9199999999999999

Stability:

Stable. Highly flammable - readily forms explosive mixtures with air. Note the boiling point close to room temperature, the low flash point and high vapour pressure. Incompatible with oxidizing agents. Refrigerate before opening.

InChIKey

CZDYPVPMEAXLPK-UHFFFAOYSA-N

CAS DataBase Reference

75-76-3(CAS DataBase Reference)

NIST Chemistry Reference

Silane, tetramethyl-(75-76-3)

EPA Substance Registry System

Tetramethylsilane (75-76-3)

Safety

Hazard Codes 

Xn,F+

Risk Statements 

12-48/20/22-40-38-22

Safety Statements 

36-45-33-3/7-16-9-36/37

RIDADR 

UN 2810 6.1/PG 3

WGK Germany 

3

F 

10

Autoignition Temperature

842 °F

TSCA 

Yes

HS Code 

2931 90 00

HazardClass 

3

PackingGroup 

I

Hazardous Substances Data

75-76-3(Hazardous Substances Data)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H224Extremely flammable liquid and vapour

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

Tetramethylsilane Chemical Properties,Usage,Production

Chemical Properties

Colorless clear liquid

Uses

Tetramethylsilane is used as a building block in organometallic chemistry. It acts as a by-product in the production of methyl chlorosilanes. Also, it serves as a precursor to silicon dioxide or silicon carbide. It is used as internal reference standard for the calibration of chemical sift for 1, 13 and 29 NMR spectroscopy. In addition, it is used as an aviation fuel.

Uses

NMR reference standard. In semiconductor applications (chemical vapor deposition). Tetramethylsilane (TMS) is used as a chemical shift reference for proton, carbon-13, and silicon-29 analysis in organic solvents and is given 0 as its chemical shift position.

Definition

ChEBI: Tetramethylsilane is an organosilicon compound that is silane in which the hydrogens have been replaced by methyl groups.

General Description

Tetramethylsilane appears as a colorless, mildly acidic volatile liquid. A serious fire hazard. Mildly toxic by ingestion. Emits acrid smoke and fumes when heated to high temperatures. Less dense than water and insoluble in water, but soluble in most organic solvents. Used as an aviation fuel and as an internal standard for nmr analytical instruments.

Air & Water Reactions

Highly flammable. Tetramethylsilane is insoluble in water.

Reactivity Profile

Hydrides, such as Tetramethylsilane, are reducing agents and react rapidly and dangerously with oxygen and with other oxidizing agents, even weak ones. Thus, they are likely to ignite on contact with alcohols. Hydrides are incompatible with acids, alcohols, amines, and aldehydes.

Hazard

Flammable, high fire risk.

Health Hazard

May cause toxic effects if inhaled or absorbed through skin. Inhalation or contact with material may irritate or burn skin and eyes. Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

Fire Hazard

HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.

Purification Methods

Distil it from conc H2SO4 (after shaking with it) or LiAlH4, through a 5ft vacuum-jacketed column packed with glass helices into an ice-cooled condenser, then percolate it through silica gel to remove traces of halide. [Beilstein 4 IV 3875.]