Product Identification

Product Name

Dichloroethylsilane

Synonyms

Dichloroethylsilane
Silane, dichloroethyl

CAS

1789-58-8

Formula

C2H6Cl2Si

Molecular Weight

129.06

EINECS

217-255-0

Beilstein/Gmelin

1731680

Beilstein Reference

4-04-00-04147

Physical and Chemical Properties

Appearance

A colorless fuming liquid with a pungent odor.

Solubility in water

Reacts

Melting Point

-107

Boiling Point

75.5

Vapor Pressure

50 (6 C)

Density

1.092 g/cm3 (20 C)

Heat Of Vaporization

29.9 kJ/mol

Heat Of Combustion

-1866 kJ/mol

Usage

Chemical intermediate for silicones.

Vapor Density

4.45

Refractive Index

1.4188 (20 C)

First Aid Measures

Ingestion

Dilution: immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 4 ounces/120 ml in a child). Do not induce vomiting.

Inhalation

Remove to fresh air; give artificial respiration if required.

Skin

Flush with water.

Eyes

Flush with water for 15 min.

Handling and Storage

Storage

Keep away from sources of ignition. Store in a cool, dry place. Keep refrigerated. Store in a tightly closed container. Keep under a nitrogen blanket. Flammables-area. Do not store in metal containers.

Handling

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Ingestion

Gastrointestinal tissue corrosion was observed in animals given single oral doses and may occur in humans following ingestion.

Inhalation

Three cases of permanently disabling reactive airway syndrome have been reported in adults exposed for several hours to fumes of sodium hydroxide, trichlorosilane, and silicon tetrachloride.

Skin

The application of chlorosilanes to shaved rabbit skin produced various degrees of irritation. Complete denaturation and tissue sloughing occurred within one minute after exposure to dichlorodimethylsilane, within two to three minutes after exposure to methyltrichlorosilane, ethyltrichlorosilane, and dichlorodiethylsilane, and within 10 minutes after exposure to tetrachlorosilane.

Eyes

May cause burns.

Hazards

Difficult to extinguish; re-ignition may occur. Contact with water applied to adjacent fires produces irritating hydrogen chloride fumes and flammable hydrogen gas.

UN (DOT)

1183

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Fire Fighting Measures

Flash Point

-9.4

Fire Fighting

Do not extinguish fire unless flow can be stopped. Use alcohol foam, dry chemical or carbon dioxide. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Do not use water on material itself. If large quantities of combustibles are involved, use water in flooding quantities as spray and fog. Use water spray to knock-down vapors.

Fire Potential

HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.

Accidental Release Measures

Small spills/leaks

Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. Do not use water on material itself. Neutralize spilled material with crushed limestone, soda ash, or lime.

Stability and Reactivity

Incompatibilities

Keep away from water, alcohols, acids, oxidizers, platinum, platinum and iron salts.

Stability

Stable under normal temperatures and pressures.

Decomposition

Irritating fumes of HCl and organic acid vapors may develop if this material is exposed to water or open flame.

Combustion Products

Toxic hydrogen chloride and phosgene gases may be formed.

Transport Information

UN Number

1183

Hazard Class

4.3

Packing Group

I