Product Identification

Product Name

TBDMCS

Synonyms

Silane, chloro(1,1-dimethylethyl)dimethyl
Silane, chloro-tert-butyldimethyl
tert-Butylchlorodimethylsilane
tert-Butyldimethylchlorosilane
tert-Butyldimethylsilyl chloride

CAS

18162-48-6

Formula

C6H15ClSi

Molecular Weight

150.72999999999999

EINECS

242-042-4

RTECS

VV2000000

RTECS Class

Other

Beilstein/Gmelin

505999

Beilstein Reference

4-04-00-04076

EC Class

corrosive

Physical and Chemical Properties

Appearance

White solid.

Solubility in water

Insoluble

Melting Point

87 - 90

Vapor Pressure

15 (25 C)

Density

0.810 g/cm3 (20 C)

Partition Coefficient

3.4

Heat Of Vaporization

34.8 kJ/mol

First Aid Measures

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.

Handling and Storage

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.

Hazards Identification

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.

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.

EC Risk Phrase

R 11 34 37

EC Safety Phrase

S 16 26 36/37/39 45

UN (DOT)

2985

Exposure Controls/Personal Protection

Personal 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.

Fire Fighting Measures

Flash Point

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.

Accidental Release Measures

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.

Stability and Reactivity

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.

Combustion Products

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

Transport Information

UN Number

2985

Hazard Class

3

Packing Group

II

HS Code

2931 00 95