Dimethoxydimethylsilane

Formula
C4H12O2Si
Structure
Description
Clear liquid. Alcohol-like odor.

Registry Numbers and Inventories.
CAS
1112-39-6
EC (EINECS/ELINCS)
214-189-4
R 11 36/37/38
S 16 23 26 36/37/39
RTECS
VV3641666
RTECS class
Primary Irritant
UN (DOT)
1993
Beilstein/Gmelin
1733694
Beilstein Reference
4-04-00-04100
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H12O2Si
Formula mass
120.22
Melting point, °C
-80
Boiling point, °C
82
Vapor pressure, mmHg
89 (25 C)
Vapor density (air=1)
>1
Density
0.8638 g/cm3
Solubility in water
Very soluble
Refractive index
1.3708 (20 C)
Partition coefficient, pKow
-0.45
Heat of vaporization
30.9 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.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Ground and bond containers when transferring material. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Remove all sources of ignition. Provide ventilation. A vapor suppressing foam may be used to reduce vapors. Water spray may reduce vapor but may not prevent ignition in closed spaces. Do not get water on spilled substances or inside containers.
Stability
Stable under normal shipping and handling conditions.
Incompatibilities
Strong oxidizing agents, acids.
Decomposition
Methanol.

Fire.
Flash Point,°C
-35
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water Reactive. Material will react with water and may release a flammable and/or toxic gas. Use water spray to keep fire-exposed containers cool. Extremely flammable liquid. Will be easily ignited by heat, sparks or flame. Containers may explode when heated. Extinguishing media: Use dry chemical, carbon dioxide, or alcohol-resistant foam. DO NOT USE WATER! Do NOT get water inside containers. Cool containers with flooding quantities of water until well after fire is out.
Health
1
 
Flammability
4
 
 
Reactivity
2
 

Health.
Exposure effects
   Ingestion
May cause irritation of the digestive tract.
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

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. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
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
1993
Response guide