Product Identification

Product Name

Diethyldichlorosilane

Synonyms

Dichloro(diethyl)silane
Dichlorodiethylsilane

CAS

1719-53-5

Formula

C4H10Cl2Si

Molecular Weight

157.12

EINECS

217-005-0

RTECS

VV3060000

RTECS Class

Other

Beilstein/Gmelin

605313

Beilstein Reference

4-04-00-04158

EC Class

flammable, harmful, corrosive

Physical and Chemical Properties

Appearance

A colorless liquid with a pungent odor.

Solubility in water

Decomposes

Melting Point

-96

Boiling Point

128

Vapor Pressure

5

Density

1.0538 g/cm3 (20 C)

Usage

Intermediate for silicones.

Vapor Density

5.14

Refractive Index

1.4295 (20 C)

First Aid Measures

Ingestion

Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.

Inhalation

Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

Skin

Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.

Eyes

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Handling and Storage

Storage

Store in a cool, dry place. Store in a tightly closed container. Corrosives area.

Handling

Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.

Hazards Identification

Ingestion

Causes gastrointestinal tract burns. The toxicological properties of this substance have not been fully investigated.

Inhalation

Causes chemical burns to the respiratory tract. The toxicological properties of this substance have not been fully investigated.

Skin

Causes skin burns.

Eyes

Causes eye burns.

Hazards

Vapors form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.

EC Risk Phrase

R 10 22 34

EC Safety Phrase

S 16 23 26 36/37/39 45

UN (DOT)

1767

Exposure Controls/Personal Protection

Personal Protection

Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Respirators

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Poison Class

2

Fire Fighting Measures

Flash Point

26.1

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Lower exp. limit

1.13

Fire Potential

HIGHLY FLAMMABLE.

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

Disposal Code

24

Stability

No data.

Decomposition

Carbon monoxide, carbon dioxide.

Combustion Products

Fire will produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

1767

Hazard Class

8

Packing Group

II

HS Code

2931 00 95