TBDMS chloride

  • tert-Butylchlorodimethylsilane
  • tert-Butyldimethylchlorosilane
  • tert-Butyldimethylsilyl chloride
  • Silane, chloro-tert-butyldimethyl
  • Silane, chloro(1,1-dimethylethyl)dimethyl
Formula
(CH3)3CSi(CH3)2Cl
Structure
Description
White solid.

Registry Numbers and Inventories.
CAS
18162-48-6
EC (EINECS/ELINCS)
242-042-4
EC Class
corrosive
R 11 34 37
S 16 26 36/37/39 45
RTECS
VV2000000
RTECS class
Other
UN (DOT)
2985
Beilstein/Gmelin
505999
Beilstein Reference
4-04-00-04076
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C6H15ClSi
Formula mass
150.73
Melting point, °C
87 - 90
Vapor pressure, mmHg
15 (25 C)
Density
0.810 g/cm3 (20 C)
Solubility in water
Insoluble
Partition coefficient, pKow
3.40
Heat of fusion
5.7 kJ/mol
Heat of vaporization
34.8 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. 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
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation.
Disposal code
24
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, bases, alcohols, metals.
Decomposition
Hydrogen chloride, carbon monoxide, carbon dioxide, silicon oxide.

Fire.
Flash Point,°C
22
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Flammable solid. Reacts with water to form acidic gases which when in contact with metal may liberate flammable and/or hydrogen gas. Extinguishing media: If water is the only media available, use in flooding amounts. Use dry chemical to fight fire.
Fire potential
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
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.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
2
 
 
Reactivity
0
 

Health.
Exposure effects
   Ingestion
The toxicological properties of this substance have not been fully investigated.
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes skin burns.
   Eyes
Causes eye burns.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. 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. Discard contaminated clothing in a manner which limits further exposure.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed.

Transport.
UN number
2985
Response guide
Hazard class
3
Packing Group
II
 
HS Code
2931 00 95