Butyltrichlorosilane

  • n-Butyltrichlorosilane
Formula
C4H9SiCl3
Structure
Description
A colorless liquid with a pungent odor.
Uses
Used to make various silicon containing compounds.

Registry Numbers and Inventories.
CAS
18171-74-9
EC (EINECS/ELINCS)
242-059-7
UN (DOT)
1747
Beilstein/Gmelin
1736174
Beilstein Reference
3-04-00--1905
Canada DSL/NDSL
NDSL
US TSCA
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C4H9Cl3Si
Formula mass
191.56
Boiling point, °C
132-134
Vapor pressure, mmHg
9 (24 C)
Solubility in water
Insoluble
Partition coefficient, pKow
5.42
Heat of vaporization
35.8 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
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. Use water spray to knock-down vapors. Do not use water on material itself. Neutralize spilled material with crushed limestone, soda ash, or lime. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash, cement powder, or commercial sorbents. Water spill: Use natural barriers or oil spill control booms to limit spill travel. Remove trapped material with suction hoses.
Stability
No data.
Incompatibilities
Reacts with water, moist air, or steam to produce heat and toxic, corrosive fumes of hydrogen chloride and flammable butane React vigorously with both organic and inorganic acids and with bases to generate toxic or flammable gases Reacts with alcohols, acetone and light metals.
Decomposition
Produces hydrochloric acid when exposed to water.

Fire.
Flash Point,°C
40
Fire fighting
Use dry chemical, dry sand, or carbon dioxide. Do not use water on material itself. If large quantities of combustibles are involved, use water in flooding quantities as spray and fog. Use water spray to knock-down vapors. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
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
Hydrogen chloride, chlorine, or phosgene may be formed.
Health
3
 
Flammability
2
 
 
Reactivity
2
 
 
Special
W

Health.
Exposure effects
   Ingestion
See Inhalation.
   Inhalation
TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns, or death. Effects may be delayed.
   Skin
See Inhalation.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Remove to fresh air; apply artificial respiration if required.
   Skin
Flush with water.
   Eyes
Flush with water for 15 min.

Transport.
UN number
1747
Response guide
Hazard class
8
PRTC
T
Packing Group
II
 
USCG CHRIS Code
BCS
 
Std. Transport #
4934215