Diethyldichlorosilane

  • Dichlorodiethylsilane
  • Dichloro(diethyl)silane
Formula
C4H10Cl2Si
Structure
Description
A colorless liquid with a pungent odor.
Uses
Intermediate for silicones.

Registry Numbers and Inventories.
CAS
1719-53-5
EC (EINECS/ELINCS)
217-005-0
EC Class
flammable, harmful, corrosive
R 10 22 34
S 16 23 26 36/37/39 45
RTECS
VV3060000
RTECS class
Other
UN (DOT)
1767
Beilstein/Gmelin
605313
Beilstein Reference
4-04-00-04158
Swiss Giftliste 1
G-3634
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C4H10Cl2Si
Formula mass
157.12
Melting point, °C
-96
Boiling point, °C
128
Vapor pressure, mmHg
5
Vapor density (air=1)
5.14
Density
1.0538 g/cm3 (20 C)
Solubility in water
Decomposes
Refractive index
1.4295 (20 C)

Hazards and Protection.
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.
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.
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.
Disposal code
24
Stability
No data.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
26.1
Lower exp. limit, %
1.13
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.
Fire potential
HIGHLY FLAMMABLE.
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.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.

Health.
Poison_Class
2
Exposure effects
   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.

First aid
 
   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.

Transport.
UN number
1767
Response guide
Hazard class
8
Packing Group
II
 
HS Code
2931 00 95
 
Std. Transport #
4936596